EXERCISE - II

A. Fill in the BlanksQ. 1(1) Photosynthesis is processed by which green plants trap .......... energy and convert it into ..........

energy of carbohydrates.(2) RuBP carboxylase, in the presence of high concentration of .......... acts as oxygenase.(3) In C4 pathway pyruvic acid is generated in the cells and is transferred back to .......... .(4) All the pigments are located in .......... membranes of chloroplast.(5) The radioactive spots on chromatogram can be located by .......... .(6) Biochemical mechanism for photo respiration is also called .......... metabolism.Ans. 1. solar, chemical 2. oxygen 3. mesophyll 4. thylakoid 5. radio autography

6. glycolateQ. 2(1) Source of O2 in product in photosynthesis is .......... .(2) Source of O2 in atmosphere is .......... .(3) The source of ‘C’ in photosynthetic product is ......... .(4) .......... of photosynthesis is carried out by .......... out of which 80% is carried out by .......... and

10% is carried out by ................. remaining 10% is performed by .......... .(5) The energy transformation concept was proposed by .......... .(6) The chlorophyll a, b ratio in sunplant is .......... and in shade plants .......... .(7) Chlorophylls absorb .......... and .......... wavelengths of the spectrum.(8) Photosynthesis is an .......... and ........................... .(9) Photosynthesis is a ..................... reaction.(10) Photosynthesis was initially started in .......... but here the photosynthetic type was .......... .Ans. 1. CO2 2. H2O 3. CO2 4. 90%, Aquatic plants, marine plants, fresh

water green plants, terrestrial palnts 5. Meyer 6. 5.5 : 1, 1.4 : 1 7. Red,blue 8. anabolic, endergonic or endothermic process 9. Bio-chemical10. non-oxygenic

Q. 3(1) In photosynthesis process O2 gas comes from .......... it was proved by .................... experiment.(2) Photosynthesis is absent in .......... and .......... .(3) Photosynthetic rate is maximum in .......... but more maximum ......... .(4) O2 gas exits from chloroplast in the presence of ........................ .(5) Warburg experimented on chlorella in ................. .(6) In the light reaction of photosynthesis two pigment systems were discovered by .................. .(7) In case of bacteria photosynthesis is absent there due to the absorption of .................... .(8) Two types of Electron transport systems were discovered by ................ .(9) Quantasomes name was given by ................... .(10) Maximum present enzyme on earth is .......... .(11) Chlorophyll is .................... compound.(12) Cytochromes are .................... compound.(13) Photolysis of water is absent in .............................. .(14) Photolysis of water is related to ............................. .Ans. 1. water, sulphar bacteria’s 2. fungi, cuscuta 3. red light, sunlight

4. electron receptor 5. Intermittent light 6. emerson and arnold7. Infra Red light 8. D-Arnon 9. Park and Biggins10. Rubisco 11. tetra pyrelic porphyrin 12. Iron porphyrin protein’s13. cyclic electron transport system 14. Non cyclic electron transport system

PHOTOSYNTHESIS-1

Q. 4(1) Ist electron receptor substance in PS II is ................ .(2) In the formation of glucose for light reaction there is required ....................... .(3) Kelvin experinted on .......... and ..................... .(4) Primary receptor of CO2 in Kelvin Cycle is ..................... .(5) Photosynthetic products inhibition in the Excess of O2 is called as .................... .(6) Warburg effect or photo respiration is absent in .......... .(7) .................... is present in only C4- plants.(8) Kranz Anatomy is absent in the members of .......... .(9) Photo respiration is a process in which ........ enters and ........ exits from cell.(10) Pigments are present in ............... of Bacteria.(11) Noncyclic process discovered in chromatium by ........... .(12) Chlorophyll is limitory factor during .......... .(13) Photosynthetic No. was given by ...................... .Ans. 1. Plastoqunone 2. 54 A.T.P. molecules 3. chlorella, scenedesmus algae

4. Ribulose Bi Phosphate 5. Warburg Effect 6. C4 plants 7. Kranzanatomy 8. craceulacea 9. O2, CO2 10. chrometophores11. olson 12. chlorosis 13. hlillstater atal

Q. 51. .......... was first to propose that plants prepare their food through it’s leaves.2. The carotenoids are sometimes called as .......... .3. The Q10 value for photosynthesis was first determined by ........... .4. Hill performed an experiment using .......... chloroplasts.5. The common Hill reagents are .......... and .......... .6. The phenomenon of photophosphorylation was discovered by .......... .7. By using O18 .......... confirmed that oxygen evolved in photosynthesis comes from water.8. The concept of two pigment systems emerged due to the discovery of .......... .9. P 680 is a component of ......... .10. Chlorophyll a 670 belongs to pigment system .......... .11. If quantum requirement for photosynthesis is 8 quanta, the quantum yield shall be .......... .12. CMU inhibits photosynthesis by inactivating ......... or inhibiting .......... .13. The electron released on behalf of PS I mives uphill and is accepted by .......... (recent scheme).14. The electron transport pathway is popularly called as .......... .15. When six molecules of CO2 enter the Calvin cycle, .......... molecules of ATP and .......... of NADPH

+ H+ are used up.16. When six molecules of CO2 enter the Calvin cycle, .......... molecules of inorganic phosphates are

generate till the completion of whole cycle.17. In Hatch-Slack cycle the CO2 acceptor is .......... .18. The first product of Hatch-Slack cycle is .......... .19. In C-4 plants the chloroplasts are .......... and the mesophyll cells carry out .......... cycle.20. In purple sulphur bacteria the hydrogen donor is .......... .21. In bacteria the two electron transport systems are connected in .......... .22. The concept of three cardinal points was proposed by .......... .23. In maize, a light intensity of .......... foot candles gives maximum photosynthesis.24. The CO2 compensation point is also called as .......... compensation point.25. At a temperature higher than maximum, the photosynthetic rate declines due to .......... of enzymes.26. The concentration of CO2 in the atmosphere is .......... % by volume.27. The rate of photosynthesis declines with .......... of cells.Ans. 1. stephan Hale 2. Lipochromes 3. Blackman 4. Isolated

PHOTOSYNTHESIS-2

5. Ferricyanides, Benzoquinone 6. Arnon 7. Ruben, Hassid,Kamen 8. Emerson Effect 9. Chlorophyll a 10. One (I)11. 12.5% 12. PS II, Hill Reaction 13. Fe-S Protein14. Z-Scheme 15. 18, 12 16. Seventeen 17. Phospho EnolPyruvic Acid/(PEPA) 18. Oxaloacetic Acid 19. Dimorphic, Hatch-Slack 20. Thiosulphate 21. Parallel 22. Sachs23. 2500-3000 24. Light 25. Denatured 26. 0.03%27. Aging

B. Select the correct statements

(a) Chloroplast is differentiated into two structural components i.e. grana and stroma.(b) C3 plants are more efficient than C4 plants due to absence of photo respiration.(c) Photo System II has the trap centre known as P680.(d) ATP, NADPH2 and O2 released during light phase are used in dark phase.(e) The principle of limiting factor was proposed by Emerson.(f) C4 plants have a specialised type of anatomy in leaves called Kranz type.(g) In young leaves the xanthophyll to carotene ratio is 2 : 1.(h) The carotenoids absorb wavelengths between 605-640 nm.(i) NADP was earlier called as DPN.(j) Atriplex roseus shows Calvin cycle whereas A. hastata shows Hatch-Slack cycle.Ans. (a) T (b) F (c) T (d) F (e) F (f) T (g) T (h) F (i) F (j) F

C. Match the item in Column I with appropriate item in Column II :Q. 1

Column I Column II 1. PS I 2. Heliophytes

3. Chlorophyll 4. Hatch and Slack 5. Cytochromes

A. green pigment B. C4 C. P700 D. sun loving plants E. timber F. electron acceptor

Ans. 1 - C; 2 - D; 3 - A; 4 - B; 5 - F

Q. 2

Column - I Column - II 1. Bacteria 2. O2 evolutry 3. Absorption spectrum 4. Cyanobacteria 5. Action spectrum 6. Non photosynthetic 7. Polychromatic 8. Monochromatic

A. Blue-Red B. Etiolated leaves C. oxygenic D. non-oxygenic E. sun light F. cyanobacteria G. Red light H. Red-Blue

Q. 3

Ans. 1 - D; 2 - F; 3 - A; 4 - C; 5 - H; 6 - B; 7 - E; 8 - I

PHOTOSYNTHESIS-3

Column - I Column - II 1. Robert Hill 2. Blackman 3. Chlorella 4. Red Drop 5. Infra Red 6. Enhancement Effect

A. Intermittent light B. more than 680 nm light C. Light Reaction D. less than 680 nm light E. Bacteria F. Dark Reaction

Ans. 1 - C; 2 - F; 3 - A; 4 - B; 5 - E; 6 - D

Q. 4

Column - I Column – II 1. Cyclic photophosphorelation 2. Strom a 3. Chlorophyll a 4. Chlorophyll b 5. Plastocynin 6. Ferredoxin 7. Plastocynin 8. NACPH2

A. C55 H70O6N4Mg B. Copper C. PS-I D. Dark Reaction E. More than 680 nm light F. C55 H72O5N4Mg G. 3 ATP molecules H. Connection between PS-I and PS-II

Ans. 1 - E; 2 - D; 3 - F; 4 - A; 5 - B; 6 - C; 7 - H; 8 - G

Q. 5

Column – I Column - II 1. Chrometography 2. Hatch & Slack 3. Kranz anatomy absent 4. Radioisotopy 5. Photorespiration absent

A. C4 plants B. CAM plants C. C3 plants

Ans. 1 - C; 2 - A; 3 - B; 4 - C; 5 - A

D. Analogy Type QuestionsObserve the relationship between the first two words and then fill the suitable word/words at fourth place :

(a) Chlorophyll a : CH3 :: Chlorophyll b : ..........(b) RuBP : Ribulose 1, 5 biphosphate :: PGA : ..........(c) PGA : 3-carbon compound :: RuBP : ..........(d) Cyclic photophosphorylation : PS I :: Non-cyclic photophosphorylation : .......... .Ans. (a) - CHO, (b) Phosphoglyceric acid, (c) 5 carbon compound (d) PS I and PS

II.

E. Very short Answer Questions.1. Name two raw materials of photosynthesis.2. What is the structural difference between Chlorophyll a and Chlorophyll b?3. Give the single chemical equation of photosynthesis.

PHOTOSYNTHESIS-4

4. What name is given to the process of splitting of water during light reaction?5. What is the primary source of energy of all living organisms?6. Name any three C4 plants.7. What tissues and cells of a leaf contain the chloroplasts?8. Who first recognised the importance of chlorophyll in photosynthesis?9. Name the tissues and organs which act both as sources and sinks depending upon the need of the

plant.10. What is source?11. Who first recognised that oxygen is ecvolved from water during photosynthesis?12. What is photophosphorylation?13. What do you mean by sink?14. Name the inorganic ions required for photolysis of water?15. Which enzyme is required for photolysis of water in the process of photosynthesis?16. What does Hill’s experiment prove?17. Which wavelength (colour) of visible spectrum is more effective in the process of photosynthesis?18. What colour of visible spectrum is least effective in the process of photosynthesis?19. Write one anatomical feature of C4 palnts.ANSWERS

1. CO2 and H2O 2. -CH3 group of Chlorophyll a is replaced by -CHO group in Chlo-rophyll b 3. 6 CO2 + 12H2O C6H12O6 + 6H2O + 6O2

4. Photolysis 5. Sunlight 6. Maize, sugracane, sorghum7. Mesophyll 8. Dutrochet 9. Storage tissues, seeds10. Leaves etc. which contain higher concentration of food11. Van Neil 12. light energised13. Regions where the food is to be utilized or stored 14. Mn2+, Cl-

15. Water oxidising enzyme complex known as Xn-state 16. Oxygen is evolvedduring light phase 17. Red 18. Green19. Kranz anatomy in leaf.

PHOTOSYNTHESIS-5

EXERCISE - I1. The oxygen in photosynthesis is released from

(A) CO2 (B) H2O(C) Carbohydrate (D) Chlorophyll

2. Photosynthesis is the fastest in(A) Blue light (B) Sun light (C) Red light (D) Green light

3. In photosynthesis(A) No ATP is formed (B) ATP is formed in initial stages(C) Water is not involved (D) Oxygen comes from carbon dioxide.

4. The first food substance plants make in photosynthesis is(A) Sugar (B) Starch (C) Proteins (D) Fats.

5. Hypothesis for oxygen coming from water was put forward by(A) Hill (B) Warburg (C) Blackman (D) Mendel.

6. The first product of CO2-fixation in C4-plants is(A) Phosphoglyceric acid (PGA) (B) Oxalo-acetate(C) Malic acid (D) Phosphoenol-pyruvate

7. The first scientist to find out the role of light in photosynthesis was(A) Ingenhousz (B) Senebier (C) Priestley (D) Sachs.

8. The empirical formula for chlorophyll a is(A) C35H72O54N4Mg (B) C65H70O6N4Mg(C) C55H72O5N4Mg (D) C45H70O6N4Mg.

9. The process of taking in CO2 by plants and releasing O2 is component of(A) Transpiration (B) Respiration (C) Endosmosis (D) Photosynthesis

10. During photosynthesis O2 is liberated by oxidation of(A) H2O (B) CO2(C) Phosphoglyceraldehyde (D) None.

11. Our present day view regarding photosynthesis is that it(A) Converts light energy into chemical energy(B) Creates useful energy(C) Fixes CO2 into carbohydrates(D) Reverses the action of respiration.

12. In which of the following process the light energy is convered into chemical energy(A) Digestive action (B) Respiration (C) Fermentation (D) Photosynthesis.

13. Photophosphorylation is the process in which(A) CO2 and O2 unite(B) Phosphoglyceric acid is produced(C) Aspartic acid is formed(D) Light energy is converted into chemical energy through production of ATP.

14. The first step in photosynthesis is the(A) Joining of 3-carbon atom to form Glucose(B) Formation of ATP(C) Ionization of water(D) Excitement of an electron of chlorophyll by photon of light.

15. The specific function of light energy in the process of photosynthesis is to(A) Activate chlorophyll (B) Split water(C) Reduce carbon dioxide (D) Synthesize glucoses.

16. When cell converts light energy into chemical energy, which of the following reation would takeplace.(A) ADP + iP = ATP (B) ATP - iP = ADP(C) AMP + iP = ADP (D) GDP + iP = GTP.

PHOTOSYNTHESIS-6

17. Photophosphorylation means synthesis of(A) ATP from ADP (B) NADP(C) ADP form ATP (D) PGA.

18. ATP formation during photosynthesis is(A) Phosphorylation (B) Photophosphorylation(C) Oxidative phosphorylation (D) None of the above.

19. Chlorophyll is present(A) On the surface of chloroplast (B) Dispersed throughout chloroplast(C) In the stroma of chloroplasts (D) In the grana of chloroplasts.

20. Pigment system is concerned with(A) Flowering (B) Reduction of CO2(C) Photolusis of water (D) None.

21. Chloroplast contains maximum quantity of(A) RuDP-carboxylase (B) Hexokinase(C) Pyruvic carboxylase (D) None.

22. The process in which water is split during photosynthesis is(A) Photolysis (B) Hydrolysis (C) Plasmolysis (D) Hemolysis.

23. Discovery of Emerson effect has clearly shown the existence of(A) Two distinct photochemical reactions or processes(B) Light and dark reactions in photosynthesis(C) Photophosphorylation(D) Photo-respiration.

24. Besides water and light which is more essential as a raw material for food formation(A) CO2 (B) NAD (C) O2 (D) Mineral salts.

25. Which of the following wave length of light is absorbed maximum for photosynthesis(A) 660 nm (B) 440 nm (C) 680 nm (D) 700 nm

26. The basic structure of chlorophyll comprises of(A) Prophyrin system (B) Cytochrome system(C) Plastocyanin system (D) Flavoprotein only.

27. In pigment system II, active chlorophyll is(A) P680 (B) P700 (C) P673 (D) P720

28. During ATP synthesis, electrons pass through(A) CO2 (B) O2 (C) H2O (D) Cytochromes.

29. The site for light reaction is(A) Grana (B) Stroma (C) ER (D) Cytoplasm.

30. Which one is the precursor of chlorophyll(A) Bacteriochlorophyll (B) Bacterio-viridin(C) Tryptophan (D) Chlorophyllide (proto-chlorophyll).

31. Where does the primary photo-chemical reaction occur in chloroplast(A) Stroma (B) Periplast cavity(C) Quantasomes (D) Inner membrane of chloroplast.

32. Assimilatory power produced in Hill reaction and used in Blackman’s reaction refers to(A) Generation of ATP and NADPH2 (B) Reduction of CO2(C) Splitting of water (D) Disintegration of plastids.

33. Water soluble pigment is(A) Chlorophyll (B) Carotene (C) Anthocyanin (D) Xanthophyll

34. Grana refer to(A) Stacks of thylakoids in plastids of higher plants(B) A constant in quantum equation(C) Glycolysis of glucose (D) By-product of photosynthesis.

PHOTOSYNTHESIS-7

35. Which one of the following pigments does not occur in chloroplast(A) Chlorophyll (B) Carotene (C) Anthocyanin (D) Xanthophyll

36. Chlorophyll absorbs(A) Green light (B) Red light only(C) Blue light only (D) Blue as well as red light.

37. At which wavelength of light, bacteria carry out photosynthesis(A) Ultra violet (B) Blue (C) Red (D) Far-red (Near infrared)

38. The number of chlorophyll molecules in a quantasome is(A) 50-100 (B) 200-250 (C) 300-400 (D) 500-600.

39. The process of photophosphorylation was discovered by(A) Calvin (B) Arnon (C) Priestley (D) Warburg.

40. That oxygen produced during photosynthesis comes from water was proved by(A) Ruben (B) Robert Mayer (C) M. Calvin (D) Blackman.

41. Which colour of light gives maximum absorption peak of chlorophyll a(A) Red (B) Blue (C) Green (D) Yellow.

42. For process of photosynthesis all except one of the following items are essential Point out theexception(A) Water, minerals (B) Light, chlorophyll(C) CO2 optimum temperature (D) O2, sucrose.

43. The two pigment system theory of photosynthesis was proposed by(A) Hill (B) Blackman (C) Emerson (D) Arnon.

44. Dark reaction in photosynthesis is called so because(A) It can occur in dark alone (B) It does not require direct light energy(C) It cannot occur during day time (D) It occurs more rapidly at night.

45. Carbon dioxide is formed in all the following except(A) Respiration in plants (B) Burning of sugar(C) Heating of lime stone (D) Photosynthesis of plants.

46. CO2 is necessary for photosynthesis. The chemical used to remove this gas most effectively fromentering a control apparatus is(A) Potassium hydroxide solution (B) Calcium oxide(C) Sodium carbonate (D) Distilled water

47. In case of C4-pathway(A) CO2 combines with PGA (B) CO2 combines with PEP(C) CO2 first combines with RuBP (D) CO2 combines with RMP.

48. During photosynthesis when PGA is changed into phosphogylceraldehyde, which of the followingreactions occurs ?(A) Oxidation (B) Reduction (C) Electrolysis (D) Hydrolysis.

49. Which one is a C4-plant?(A) Papaya (B) Pea (C) Potato (D) Maize/Corn

50. During photosynthesis the oxygen in glucose comes from(A) H2O (B) CO2(C) Both from H2O and CO2 (D) Oxygen in air.

51. Ribulose biphosphate carboxylase enzyme catalyses the reaction between(A) Oxaloacetic acid and acetyl CoA(B) CO2 and ribulose 1, 5, biphosphate(C) Ribulose biphosphate and phosphoglyceraldehyde(D) PGA and dihydroxy acetone phosphate.

52. Which of the following enzyme is used for carboxylation of RuBP?(A) Carboxydismutase (B) Hexose kinase(C) Peroxidas (D) Phosphopentokinase.

PHOTOSYNTHESIS-8

53. In C4-pathway initial carbon dioxide fixation occurs in chloroplasts of(A) Guard cells (B) Mesophyll (C) Bundle sheath (D) All the above.

54. The law of limiting factors for photosynthesis was enunciated by(A) R. Hill (B) Calvin (C) Krebs (D) Blackman.

55. Calvin cycle occurs in(A) Chloroplasts (B) Cytoplasm (C) Mitochondria (D) Glyoxysomes.

56. C4-cycle was discovered by(A) Hatch and slack (B) Calvin (C) Hill (D) Arnon.

57. During dark reaction of photosynthesis(A) Water is split (B) CO2 is reduced to organic compounds(C) Chlorophyll is activated (D) 6C sugar is broken down into 3C sugar

58. During day-light hours the rate of photosynthesis is higher than that of respiration and the ratio ofO2 produced to that of consumed is(A) 1 : 1 (B) 10 : 1 (C) 50 : 1 (D) 5 : 1

59. Which one is most efficient convertor of sunlight?(A) Surgarcane (B) Rice (C) Wheat (D) Papaya.

60. Dark reaction of photosynthesis occurs in(A) Grana (B) Stroma (C) Matrix (D) Cytoplasm.

61. In C3 plants first stable product of photosynthesis during dark reaction is(A) PGA (B) PGAL (C) RuBP (D) Oxalo acetic acid

62. The isotope of carbon used extensively for studies in photosynthesis is(A) 13C (B) 14C (C) 15C (D) 16C

63. Red drop discovered by Emerson is due to disruption of photochemical activity of(A) Carotenoids (B) PS I (C) PS II (D) Both B and C.

64. The first carbon dioxide acceptor in C4-plants is(A) Phosphoenol-pyruvate (B) Ribulose 1, 5-diphosphate(C) Oxalo-acetic acid (D) Phosphoglyceric acid.

65. The carbon dioxide acceptor in Calvin cycle/C3-plants is(A) Phospho-enol pyruvate (PEP) (B) Ribulose 1, 5-diphosphate (RuBP)(C) Phosphoglyceric and (PGA) (D) Ribulose monophosphate (RMP).

66. The process of photosynthesis is(A) Reductive, exergonic and catabolic (B) Reductive, endergonic and catabolic(C) Reductive, exergonic and anabolic (D) Reductive, endergonic and anabolic.

67. Nine-tenth of all photosynthesis of world (85-90%) is carried out by(A) Large trees with millions of branches and levess(B) Algae of the ocean(C) Chlorophyll containing ferns of the forest(D) Scientists in the laboratories.

68. Glycolate accumulates in chloroplasts when there is(A) High CO2 (B) Bright light (C) Low temperature (D) Low CO2

69. Starch is insoluble in wate. Yet it accumulates in large quantities in potato because(A) It is synthesized in potato tuber itself(B) It is translocated from the leaves to the tuber in the form of sugar(C) Soil micro-organisms deposit starch in tuber(D) It is useful for consumption.

70. The C4-plants are different from the C3-plants with reference to the(A) The substance that accepts CO2 in carbon assimilation(B) Types of end product of photosynthesis(C) The number of NADPH that are consumed in preparing sugar(D) Tupes of pigments involved in photosynthesis

PHOTOSYNTHESIS-9

71. Which one of the following would not be limiting factor in photosynthesis?(A) O2 (B) CO2 (C) Chlorophyll (D) Light.

72. Moll’s experiment shows(A) Unequal transpiration from two surfaces of leaf(B) CO2 is essential for photosynthesis(C) Relation between transpiration and absorption(D) Chlorophyll is essential for photosynthesis

73. Starch is detected in food by its(A) White appearance (B) Blue reaction with iodine solution(C) Presence as an energy store (D) Granular from even if cooked.

74. Much of the starch is deposited in Banana fruit as it matures. Which of the following explains howthe starch gets there(A) Starch solution passes through cells from phloem to fruit(B) Starch grains passs through cells from xylem to fruit(C) Starch solution passes through companion cells to fruit(D) A sugar solution passes through phloem cells to the fruit where it is changed to starch

75. The percentage of light energy utilised for photosynthesis by higher plants is(A) 100 (B) 50 (C) 10 (D) 1 - 2

76. Which of the following is least effective in photosynthesis(A) Sunlight (B) Red light (C) Blue light (D) Green light.

77. The experimental material that has largely been responsible for making rapid advances in researchon photosynthesis is(A) Chlamydomonas (C) Chlorella(C) Spinach leaf (D) Hydrilla.

78. A plant is kept in 300 ppm CO2 concentration. What will happen to it(A) Plant will die soon (B) Plant will not grow but will not die(C) Plant will shown normal photosynthesis (D) Respiration will be greatly decreased.

79. Which of the following have high CO2 compensation point(A) C2-plants (B) C3-plants (C) C4-plants (D) Alpine herbs.

80. An essential process connected with photosynthesis is(A) Photolysis of water (B) Synthesis of glucose(C) Breakdown of glucose (D) Photophosphorylation.

81. Correct equation for photosynthesis is(A) C6H12O6 + 6O2 6CO2 + 6H2O(B) 6CO2 + 6H2O C6 + H12O6+ 6O2(C) 6CO2 + 12H2O C6 + H12O6+ 6O2 + 6H2O(D) 6CO2 + 10H2O C6H12O6 + O2 + 4H2O

82. Rate of photosynthesis is independent of(A) Intensity of light (B) Duration of light (C) Quality of light (D) Temperature.

83. In angiosperms, chlorophyll formation requires(A) Cytochrome (B) Carotenes (C) Chloroplasts (D) Light.

84. PEP is CO2 acceptor in(A) C4 plants (B) C3 plants (C) C2 plants (D) Both A and B.

85. Absorption of light brings about(A)Absorption of CO2 (B) Liberation of O2(C) Oxidation of chlorophyll (D) Reduction of chlorophyll.

86. Light energy is changed to chemical energy in the process of(A) Bioluminescence (B) Photosynthesis(C) Both A and B (D) Photorespiration.

PHOTOSYNTHESIS-10

87. Which one directly transfers electrons to NADP+ during light reaction?(A) PSI (B) PSII (C) Cytochromes (D) Plastocyanin.

88. Compensation point is the value of a factor where there is(A) Beginning of photosynthesis(B) Little photosynthesis(C) Photosynthesis equal to rate of respiration(D) Neither photosynthesis nor respiration.

89. NADP+ is hydrogen acceptor of(A) Krebs cycle (B) Photolysis(C) Hexose monophosphate shunt (D) Both A and C

90. Maize, Sugarcane and some other tropical plants have high efficiency of CO2 fixation becausethey operate(A) Calvin cycle (B) Hatch-Slack cycle(C) TCA cycle (D) PP pathway.

91. Which one of the following is the common storage product of photosynthesis(A) Protein (B) Fat (C) Starch (D) Sucrose/glucose.

92. Energy change in photosynthesis is(A) Electrical Chemical (B) Light Chemical(C) Chemical Light Electrical (D) Light Electrical Chemical.

93. What is true for photosynthesis(A) Both carbon dioxide and water are oxidised(B) Both carbon dioxide and water are reduced(C) Carbon dioxide is oxidised and water reduced(D) Carbon dioxide is reduced and water osidised.

94. Leaves are green because they(A) Absorb green light (B) Do not absorb but reflect green light(C) Utilise green light (D) Absorb and reflect green light.

95. Chlorophyll takes part in(A) Absorption of light(B) Absorption of CO2(C) Absorption of electorns(D) Absorption of light and photochemical splitting of water.

96. Chloroplasts fix(A) Nitrogen (B) Oxygen (C) Carbon dioxide (D) Hydrogen

97. NAD is(A) Nicotinamide adenine dinucleotide (B) Nicotinamide adenosine dinucleotide(C) Nicotine adenosine diphosphate (D) Nicotinamide adenine diphosphate.

98. The ingredient required for ATP synthesis is(A) Ca (B) S (C) P (D) Fe.

99. Conversion of ATP to ADP produces(A) Electricity (B) Energy (C) Hormones (D) Enzymes.

100. Cyclic photophosphorylation produces(A) NADPH` (B) ATP and NADPH(C) ATP, NADPH and O2 (D) ATP only.

101. Bacterial photosynthesis contains(A) PS I (B) PS II(C) Both PS I and PS II (D) None of them.

102. Who discovered purification of air in light by greeen plants(A) Ingenhousz (B) Priestley (C) De Saussure (D) Mayer.

PHOTOSYNTHESIS-11

103. In bacterial photosynthesis, the hydrogen donor is(A) H2O (B) H2SO4 (C) NH3 (D) H2S.

104. In a chlorophyll molecule, magnesium is present(A) At one ene of porphyrin (B) Centre of porphyrin(C) Phytol tail (D) Between prophyrin head and phoytol tail.

105. In aquaria, green plants are grown for(A) CO2 (B) Fish food (C) Oxygen (D) Both A and B.

106. Hydrilla is used for demonstrating photosynthesis because it shows(A) Little respiration(B) Little transpiration(C) Rapid photosynthesis(D) Evolution of O2 bubbles which can be collected over water.

107. Algae often float on surface of water during day but sink down during night due to(A) Evolution and trapping of oxygen bubbles during the day in their photosynthesis(B) Becoming light as they consume most of their food in the night(C) Warming action of sun during the day(D) Release of absorbed air by warming of water

108. Thylakoids removed from chloroplasts were kept in illuminated culture having CO2 and water. Itdid not produce sugar because of(A) Absence of enzymes (B) Nonlinking of PS I and PS II(C) Absence of light trapping (D) Nonformation of assimilatory power.

109. Quanta required for assimilation of one molecule of CO2 or liberation of the molecule of oxygenare(A) 16 (B) 8 (C) 4 (D) 2.

110. Which is not required for synthesis of carbohydrates(A) Chlorophyll (B) Water (C) Nitrogen (D) Carbon dioxide.

111. Both respiration and photosynthesis require(A) Sunlight (B) Green cells (C) Cytochromes (D) Organic substrate.

112. Isotopes employed to study photosynthesis are(A) 11C and 32P (B) 15C and 32P (C) 16C and 15N (D) 14C and 18O.

113. Hill reaction occurs in(A) Dark (B) Light(C) Both light and dark (D) All the time.

114. Which of the following constitutes Hill reaction(A) Photolysis by chloroplasts(B) Photolysis of water by isolated chloroplasts forming ATP and NADPH(C) Photolysis of water by isolated illuminated chloroplast causing reduction of some chemicalsand liberation of oxygen(D) Photolysis of water liberating oxygen and hydrogen by illuminated isolated chloroplasts.

115. In C4 plants, synthesis of sugars/final CO2 fixation occurs in(A) Palisade cells (B) Spongy cells(C) Undifferentiated mesophyll cells (D) Bundle sheath cells.

116. The products of photochemical reaction are(A) O2, ATP and NADPH (B) O2(C) ATP and NADPH (D) Organic compounds especially carbohydrates.

117. The substrate for photorespiration is(A) Phosphoglyceric acid (B) Glycolate(C) Serine (D) Glycine.

118. Carbon dioxide joins the photosynthetic pathway in(A) PS I (B) PS II (C) Light reaction (D) Dark reaction.

PHOTOSYNTHESIS-12

119. Nobel Prize was awarded to the scientist for discovering the pathway of carbon assimilation(A) Watson (B) Krebs (C) Calving (D) Parnas.

120. A photosynthetic organism which does not release oxygen is(A) Blue-green alga (B) Green sulphur bacterium(C) Green alga (D) Algal component of lichen.

121. PS II contains a nonchlorophyllous pigment in blue-green algae(A) β -carotene (B) Zeaxanthin (C) Phycocyanin (D) Cytochrome c.

122. The evidence that during photosynthesis oxygen comes from water(A) Photosynthetic bacteria employ H2S and CO2 to form carbohydrates, water and sulphur(B) Isolated illuminated chloroplasts release oxygen if provided with potassium ferrocyanide(C) Isotopic 118O provided as 18

2H O appears as 18O2 liberated in photosynthesis(D) All the above.

123. Which one results in energy wastage(A) Photosynthesis (B) Photorespiration (C) Dark respiration (D) Glycolysis.

124. NADP+ is reduced to NADPH in(A) PS I (B) PS II(C) Calving cycle (D) Noncyclic photophosphorlation.

125. Formation of ATP in photosynthesis and respiration is an oxidation process which utilises theenergy from(A) Cytochromes (B) Ferredoxin (C) Electrons (D) Carbon dioxide.

126. Chemosynthesis and photosynthesis are similar in being(A) Found inembryophytes (B) Associated with heterotrophs(C) Dependent on solar energy (D) Autotrophic in nutrition.

127. Photosynthetic pigments found in the chloroplasts occur in(A) Thylakoid membranes (B) Plastoglobules(C) Matrix (D) Chloroplast envelope.

128. Which photosynthetic bacteria possess both PS I and PS II(A) Purple sulphur bacteria (B) Cyanobacteria(C) Purple nonsulphur bacteria (D) Green sulphur bacteria.

129. When the rate of translocation is slow, the rate of photosynthesis shall(A) Increase (B) Decrease (C) Remain unchanged (D) Become zero.

130. C4 plants are also known as(A) Calvin type (B) Calvin-Bassham type(C) Hatch and Slack type (D) Emerson type.

131. In C4 plants, Calvin cycle operates in(A) Stroma of bundle sheath chloroplasts (B) Grana of bundle sheath chloroplasts(C) Grana of mesophyll chloroplasts (D) Stroma of mesophyll chloroplasts

132. Photosynthesis has two reaction complexes, one followed by the other. The second reaction com-plex(A) Traps light energy (B) Synthesises starch(C) Functions in the presence of light (D) Fixes carbon dioxide.

133. Ribulose biphosphate carboxylase oxygenase is located inside(A) Chloroplasts (B) Mitochondria (C) Golgi bodies (D) Peroxisomes.

134. As compared to chlorophyll a, bacteriochlorophyll has(A) One pyrrole ring with four hydrogen (B) One pyrrole ring with three hydrogen(C) One pyrrole ring with two hydrogen (D) One pyrrole ring with one hydrogen.

135. Greatest producers of organic matter are(A) Crop plants (B) Forests(C) Plants of the land area (D) Phytoplankton of oceans.

PHOTOSYNTHESIS-13

136. C4 plants belong to(A) Gramineae (B) Monocots(C) Dicots (D) Both monocots and dicots.

137. Sugarcane shows high efficiency of CO2 fixation because it performs(A) Calvin cycle (B) EMP pathway(C) Hatch and Slack pathway (D) TCA cycle.

138. Which is sensitive to longer wavelengths of light(A) PS II (B) PS I (C) Phosphorylation (D) Photolysis

139. Which products of Hill reaction are used in Blackman’s reaction(A) ATP, NADPH (B) ATP, NADH (C) ADP, NAD (D) ATP, NAD.

140. The size of chlorophyll molecule is(A) Head 15 x 15 Å, tail 25 Å (B) Head 20 x 20 Å, tail 25 Å(C) Head 15 x 15 Å, tail 20 Å (D) Head 10 x 12 Å, tail 15 Å.

141. Dark reactions of photosynthesis occur in(A) Granal thylakoid membranes (B) Stromal lamella membranes(C) Stroma outside photosynthetic lamellae (D) Periplastidial space.

142. A very efficient converter of solar energy with net productivity of 2 - 4 kg/m2 or more is the cropof(A) Wheat (B) Sugarcane (C) Rice (D) Bajra.

143. Who proved that oxygen evolved in photosynthesis comes from water(A) Mayer (B) Calvin(C) Ruben, Hassid and Kamen (D) Blackman

144. Flashing light experiments on photosynthesis were performed by(A) Hill (B) Calvin (C) Blackman (D) Emerson and Arnold.

145. Kranz anatomy is typical of(A) C4 plants (B) C3 plants (C) C2 plants (D) CAM plants.

146. Pigment system I performs independently(A) Noncyclic photophosphorylation (B) Cyclic photophosphorylation(C) Oxidative phosphorylation (D) Photolysis.

147. Algae employed by Calvin et al in experiments on photosynthesis belong to(A) Euglena (B) Chara (C) Chlomydomonas (D) Chlorella.

148. Green light has a wavelength of(A) 400 - 450 nm (B) 500 - 580 nm (C) 660 - 720 nm (D) 720 - 800 nm.

149. Conversion of PGA to PGAL involves(A) Reduction (B) Oxidation (C) Hydrolysis (D) Photolysis.

150. Aerobic bacteria collect near illuminated phytoplankton due to(A) Manufactured food (B) Light(C) Oxygen (D) Reduced CO2 concentration.

151. Chlorophyll b is(A) C54 H70 O6N4Mg (B) C55 H70 O6N4Mg(C) C55 H72 O5N4Mg (D) C45 H72 O5N4Mg.

152. Cyclic photophosphorylation is carried out by(A) PS I (B) PS II (C) Both A and B (D) Photolysis and PS II.

153. Maximum O2 evolution occurs from(A) Forests (B) Marine phytoplankton(C) Crops (D) Land mass.

154. Which technique has helped in investigation of Calvin cycle?(A) X-ray crystallography (B) X-ray technique(C) Radioactive isotope technique (D) Intermittent light.

PHOTOSYNTHESIS-14

155. Downward movement of organic and inorganic solutes from lraves occurs through(A) Phloem by diffusion (B) Pholem by protoplasmic streaming(C) Parenchymatous cells by diffusion (D) Phloem by mass flow.

156. Which one of the following does not perform C4 photosynthesis?(A) Saccharum (B) Zea mays(C) Triticum aestivum ( = T. vulgare)/Crotalaria (D) Euphorbia milli ( = E. splendens)

157. During mansoon, the rice crop of eastern states of India shows lesser yield due to limiting factor of(A) CO2 (B) Light (C) Temperature (D) Water.

158. Site of O2 evolution and photophosphorylation is(A) Granal stacks (B) Chloroplast surface(C) Inner membrane of chloroplasts (D) Stroma.

159. Photosynthetic enhancement with flashing light was first observed by(A) Benson and Calvin (B) Hill and Calvin(C) Hatch and Slack (D) Emerson and Arnold.

160. Path of dark reaction of photosynthesis was traced through the use of(A) 32P (B) 14CO2 (C) 18O2 (D) X-rays.

161. Chlorophyll is found in(A) Stroma of chloroplasts (B) Grana of chloroplasts(C) Covering of chloroplasts (D) Dispersed form in the chloroplasts.

162. Chief functions of leaves are(A) Transpiration and photosynthesis (B) Respiration and photosynthesis(C) Respiration and digestion (D) Respiration and transpiration.

163. Through which of the following does an electron pass to NADP+ in light reaction(A) Cytochrome (B) Ferredoxin (C) Plastoquinone (D) Plastocyanin.

164. Emerson found photosynthesis to increase with light flashes. Balckman observed increase in pho-tosynthesis with the increase in light and CO2 till temperature became limiting. What of the follow-ing is true in light of above observation.(A) Light intensity is temperature dependent(B) Light harvesting occurs only in the presence of CO2(C) Photosynthesis has two phases, light and dark(D) One factor is limiting photosynthesis at one time.

165. At high oxygen concentration, the rate of photosynthesis decreases due to(A) Warburg effect (B) Pasteur effect(C) Emerson effect (D) Richmond Lang effect.

166. Quantasomes occur in(A) Chloroplasts (B) Mitochondria (C) Nucleus (D) Lysosomes.

167. Most effective wavelength of light for photosynthesis is(A) Green (B) Violet (C) Red (D) Yellow.

168. The enzyme that catalyses carbon dioxide fixation in C4 plants is(A) RuBP carboxylase (B) PEP carboxylase(C) Carbonic anhydrase (D) Carboxydismutase.

169. Ferredoxin is a constituent of(A) PS I (B) PS II (C) Hill reaction (D) P680.

170. Photo-oxidation or photolysis of water (in photosynthesis) occurs in association of(A) Cytochrome B6 (B) Plastocyanin (C) PS II (D) PS I

171. Photosystem II occurs in(A) Stroma (B) Cytochrome(C) Grana (D) Mitochondrial surface.

172. All types of plastids possess essentially the same structure because they(A) Perform the same function (B) Store food materials like starch, fat and protein(C) Occur in aerial parts (D) Can transform from one form to another.

PHOTOSYNTHESIS-15

173. Chlorophyll a occurs in(A) All photosynthetic autotrophs (B) In all higher plants(C) All oxygen liberating autotrophs (D) All plants except fungi.

174. The source of oxygen evolved during photosynthesis is(A) CO2 (B) H2O(C) Carbohydrate (D) Photosynthetic curve.

175. Bacterial photosynthesis differs from that of higher plants in(A) Not liberating oxygen (B) Nonrequirement of light(C) Nonfixation of energy (D) Requirement of host organism.

176. ATP is(A) Adenine triphosphate (B) Adenosine tetraphosphate(C) Adenosine triphosphate (D) Adenine tetraphosphate.

177. For synthesis of a molecule of glusose, the requirement of ATP and NADPH is respectively?(A) 15 and 10 (B) 33 and 22 (C) 12 and 8 (D) 18 and 12

178. Food is transported to different parts of plant through(A) Xylem (B) Phloem (C) Pith (D) Cortex

179. Presence of organic substances in the phloem can be demonstrated by means of(A) Ringing of stem (B) Grafting (C) Root pressure (D) Defoliation

180. Translocation of carbohydrate nutrients usually occurs in the form of(A) Glucose (B) Maltose (C) Starch (D) Sucrose.

181. Which one dies first when a ring of bark is removed(A) Shoot (B) Root(C) None (D) Both shoot and root die simultaneously.

182. Complete girdling ultimately kills the tree due to(A) Starvation of root (B) Stoppage of photosynthesis(C) Nonmovement of minerals (D) Nonmovement of water

183. Which of the following trees will die first(A) Deciduous (B) Pruned (C) Hollowed trunk (D) Girdled.

184. The loss of which will harm the tree most(A) Bark (B) Half the leaves (C) Half the branches (D) All the leaves.

185. Gradient of turgor pressure as the possible mechanism of nutrient translocation was given by(A) Curtis (B) Dixon adn Joly (C) Munch (D) Mason and Maskell.

186. Mass flow hypothesis was put forward by(A) Swanson (B) Munch (C) Curtis (D) De Vries.

187. Mass flow hypothesis explains(A) Transpiration (B) Translation (C) Transcription (D) Translocation.

188. Oxygen containing carotenoids are(A) Carotenes (B) Xanthophylls (C) Phycobilins (D) Anthocyanins.

189. In the two light reactions of photosynthesis(A) PS I produces strong oxidant while PS II a strong reductant(B) PS I produces strong reductant NADPH while PS II a strong oxidant(C) PS I emits electrons for PS II(D) PS I produces ATP which is not formed by PS II.

190. When day light hours are increased, the rate of photosynthesis(A) Increases (B) Decreases(C) Remains unchanged (D) None of the above.

191. Photosynthesis is(A) Photochemical process (B) Chemical process(C) Oxidation process (D) Reduction process.

PHOTOSYNTHESIS-16

192. The scientist to discover photophosphorylation was(A) Arnon (B) Hill(C) Willstatter and Stoll (D) Park and Biggins.

193. Synthesis of ADP + Pi ATP in grana/photosynthesis is(A) Phosphorylation (B) Photophosphorylation(C) Oxidative phosphorylation (D) Photolysis.

194. PS II performs(A) Reduction of CO2 (B) Photolysis of water(C) Liberation of energy (D) Formation of water

195. Kranz anatomy occurs in(A) Leaves (B) Stem (C) Flower (D) Seed

196. Photosynthate is translocated through(A) Sieve tubes/phloem cells (B) Tracheids(C) Xylem vessels (D) Latex ducts.

197. Photorespiration occurs in(A) Ribosomes (B) Mitochondria (C) Peroxisomes (D) Lysosomes.

198. CAM occurs in(A) Thin green leaves with reticulate (B) Thin green leaves with parallel venation(C) Thin coloured leaves (D) Fleshy green leaves.

199. Maximum solar energy is trapped by(A) Planting trees (B) Cultivating crops(C) Growing algae in tanks (D) Growing grasses.

200. A photosynthesising plant is releasing 18O more than the normal . The plant must have been sup-plied with(A) O3 (B) H2O with 18O (C) CO2 with 18O (D) C6H12O6 with 18O.

201. In photosynthesis(A) ATP is formed in light reaction and glucose in dark reaction(B) Both ATP and glucose are produced in dark reaction(C) Both ATP and glucose are produced in light reaction(D) Both ATP and glucose are formed in light and dark.

202. Two types of photosynthetic pigments are(A) Chlorophyll a and carotenoids (B) Chlorophyll b and carotenoids(C) Chlorophylls and carotenoids (D) Chlorophyll a and chlorophyll b.

203. Main difference between chlorophyll a and chlorophyll b is(A) - CH3 of chlorophyll a is replaced by - CHO in chlorophyll b(B) Chlorophyll a is linear while chlorophyll b is branched(C) Chlorophyll a has no Mg(D) All the above.

204. Light energy is used in photosynthesis for(A) Breakdown of H2O (B) Brreakdown of CO2(C) Activation of chlorophyll (D) Breakdown of C6H12O6

205. Dark reaction of photosynthesis is(A) Hill reaction (B) Calvin cycle(C) Cyclic photophosphorylation (D) Noncyclic photophosphorylation

206. If plants stop photosynthesis which gas will disappear(A) CO2 (B) N2 (C) O2 (D) NH3

207. Which plant shows chloroplast dimorphism(A) Wheat (B) Rice (C) Sugar Beet (D) Sugarcane

208. Cytochromes are(A) O2 acceptors (B) H2 acceptors (C) Electron acceptor (D) H2O acceptors

PHOTOSYNTHESIS-17

209. Pigment acting as a reaction centre during photosynthesis is(A) Carotene (B) Phytochrome (C) P700 (D) Cytochrome

210. Which one occurs both during cyclic and noncyclic modes of photophosphorylation(A) Involvement of both PS I and PS II (B) Formation of ATP(C) Release of O2 (D) Formation of NADPH

211. Chlorophylls absorb visible light of wavelengths(A) 400-500 nm only (B) 300-400 nm only(C) 600-800 nm only (D) 400-500 nm and 600-700 nm.

212. During dark reaction the three carbon atoms of 3-PGA are derived from(A) RuBP only (B) CO2 only (C) RuBP + CO2 (D) RuBP + CO2 + PEP.

213. Organelles involved in photorespiration are(A) Mitochondria, chloroplasts and ribosomes(B) Mitochondria, peroxisomes and chloroplasts(C) Mitochondria, nucleus and rubosomes(D) Mitochondria, peroxisomes and glyoxysomes.

214. C4 cycle is connected with(A) Respiration (B) Photosynthesis(C) Transpiration (D) Growth and development

215. First product of photorespiration is(A) Phosphoglycolate (B) Glycolate(C) Glycine (D) None of the above.

216. Light energy is converted into chemical energy in the presence of(A) Chloroplasts (B) Pyrenoids (C) Ribosomes (D) Mesosomes

217. Photorespiration is characteristic of(A) C3 plants (B) C4 plants (C) CAM plants (D) All the above.

218. Assimilatory power formed in light reaction of phorosynthesis is(A) ATP + NADPH2 (B) ADP + NADH2 (C) ATP (D) NADPH2

219. Which one is a C4 plant(A) Maize (B) Sugarcane (C) Sorghum (D) All the above

220. Which is correct about chlorophylls a and b in leaves of higher plants(A) Both are present in equal proportion(B) Chlorophyll a is more than chlorophyll b(C) Chlorophyll a is less than chlorophyll b(D) Chlorophyll b is tem times more than chlorophyll a.

221. Who demonstrated for the first time that in photosynthesis, oxygen is evolved from water(A) Ruben and Kamen (B) Calvin (C) R. Hill (D) Govindji

222. Quantasomes occur on the surface of(A) Cristae (B) Plasmalemma (C) Nuclear envelope (D) Thylakoids

223. Liberation of oxygen when green cells in water are exposed to sunlight in presence of suitableacceptor is(A) Emerson effect (B) Blackman’s reaction(C) Hill’s reaction (D) Arnon reaction

224. Balance between CO2 and O2 is maintained by(A) Transpiration (B) Photosynthesis (C) Photorespiration (D) C4 pathway

225. ATP synthesis during light reaction is(A) Oxidative phosphorylation (B) Photolysis(C) Photophosphorylation (D) Phosphorylation

226. Calvin cycle is(A) Dependent upon light (B) Independent of light(C) Supported by light (D) Hindered by light

PHOTOSYNTHESIS-18

227. Which one is the common product of both respiration and photosynthesis(A) ATP (B) Quinone (C) Cytochrome (D) Chlorophyll

228. Photosynthesis is a process in which(A) ATP is generated (B) NADH is reduced to NAD(C) Oxidative phosphorylation occurs (D) CO2 is reduced.

229. In C4 plants, fixation of carbon dioxide occurs in(A) Transfusion tissue(B) Palisade tissue(C) Cortex of stem(D) Spongy mesophyll and bundle sheath cells.

230. Who first of all indicated that water is electron donor in photosynthesis?(A) Arnon (B) Calvin (C) Blakeslee (D) Van Niel.

231. Photosystem has main light harvesting pigments(A) Chlorophyll a-660, chl a-670, chl a-680, chla-690, chl a-700(B) Chlorophyll a-660, chl b, chl a-700, chla-800 and carotenoid(C) Chlorophyll a-680, chl a-685, chl a-695 and xanthophyll(D) Chlorophyll a-700, chl a-880, chl b, chl a-685 and phycobilins.

232. In C4 plants, chloroplasts are also found in(A) Spongy parenchyma (B) Epidermal cells(C) Guard cells (D) Bundle sheath cells

233. Carbon dioxide assimilation occurs through(A) Krebs cycle (B) Calvin cycle(C) Glycolysis (D) Anaerobic respiration

234. Chlorophyll a has(A) -CHO group (B) -COOH group(C) -CH3 group (D) No functional group

235. C4 cycle was discovered in(A) Groundnut (B) Sugarcane (C) Chrysanthemum (D) Apple.

236. Photorespiration is favoured by(A) High oxygen and low carbon dioxide (B) High carbon dioxide and low oxygen(C) High temperature and low oxygen (D) High humidity and temperature.

237. Number of Calvin cycles required to generate a molecule of hexose is(A) 2 (B) 4 (C) 6 (D) 8

238. In C4 plants, initial carbon dioxide fixation occurs in chloroplasts of(A) Palisade tissue (B) Spongy parenchyma(C) Guard cells (D) Hypodermis and chlorenchyma

239. Chlorophyll is soluble in(A) Water (B) Organic solvents (C) Both A and B (D) None of the above

240. Constituents of pigment system I are located on(A) Granal thylakoids(B) Stromal thylakoids(C) Outer surface of granal and stromal thylakoids(D) Stroma

241. Thylakoids posses photosynthetic units called(A) Quantasomes (B) Glyoxysomes (C) Polysomes (D) Ribosomes

242. Chorophyll consists of(A) Porphyrin head and phytol tail (B) Phosphate head and porphyrin tail(C) Phytol head and porphyrin tail (D) Porphyrin head and phosphate tail.

243. Enzymes PEP carboxylase and RuBP carboxylase are located in chloroplasts of(A) C3 plants (B) CAM plants (C) C4 plants (D) Both B and C.

PHOTOSYNTHESIS-19

244. Noncyclic photophosphorylation is performed by(A) Dark reaction (B) PS I (C) PS II (D) Both B and C

245. Calvin cycle occurs in(A) Cytoplasm (B) Mitochondria (C) Glyoxysomes (D) Chloroplasts

246. Calvin cycle involves(A) Oxidative carboxylation (B) Reductive carboxylation(C) Phosphorylation (D) Oxidative phosphorylation

247. Plants pyrify air during(A) Photosynthesis (B) Respiration (C) Transpiration (D) Desiccation.

248. C4 cycle is(A) Adjunct to Calvin cycle(B) Independent cycle(C) With high RuBP carboxylase efficiency(D) With PEP carboxylase in bundle sheath cells

249. Element essential for photolysis of water is(A) Nitrogen (B) Oxygen (C) Chlorine (D) Carbon

250. Supply end in solute transport is(A) Root (B) Stem(C) Green leaves and storage organs (D) Xylem and pholem

251. Photorespiration occurs in(A) Green parts (B) All living cells (C) Mitochondria (D) Root.

252. Photorespiration is affected by(A) Temperature (B) Light intensity (C) CO2 and O2 (D) All the above

253. At carbon atom III, chlorophyll a has(A) Methyl group (B) Aldehyde group (C) Carboxyl group (D) Magnesium

254. ATP formation in chloroplast and mitochondrion is explainde by(A) Cholodny-Went model (B) Chemi-osmotic theory of Mitchell(C) Munch’s mass flow theory (D) Relay pump theory of Godlewaki

255. Warburg effect is decrease in the rate of photosynthesis at(A) Low carbon dioxide concentration (B) High oxygen content(C) High carbon dioxide concentration (D) Both A and B

256. C4 plants differ from C3 plants with respect to(A) First product (B) Substrate which accepts carbon dioxide(C) Number of ATP molecules consumed (D) All the above

257. C4 pathway of CO2 fixation was discovered by(A) Blackman (B) Hatch and Slack(C) Emerson and Arnold (D) Arnon

258. Photooxidation is(A) Photorespiration (B) Photolysis(C) Light and oxygen induced break down (D) All the above

259. Core metal of chlorophyll is(A) Cu (B) Mg (C) Fe (D) Ni

260. RUBISCO content of chloroplast is(A) 20% (B) 5% (C) 11% (D) 16%

261. Which one is required for photosynthetic evolution of oxygen?(A) F-enzyme (B) Z-enzyme (C) CO-enzyme (D) M-enzyme

262. C4 plants have higher net photosynthetic rate as they have(A) No photorespiration (B) PEP as CO2 acceptor(C) Kranz anatomy (D) Phosynthesis even at low light intensity

PHOTOSYNTHESIS-20

263. Action spectrum of photosynthesis was discovered in 1883 by(A) Engelmann (B) Calvin (C) Arnon (D) Hill

264. Accessory pigments transfer their energy to chlorophyll molecules through(A) Fluorescence (B) Resonance (C) Radiation (D) Transduction

265. Primary carboxylation occurs in C3 and C4 plants with the help of(A) PEP carboxylase and pyruvate carboxylase(B) PEP carboxylase and RuBP carboxylase(C) RuBP carboxylase and PEP carboxylase(D) RuBP carboxylase and pyruvate carboxylase

266. Terms apoplast and symplast were first used by(A) Munch (B) Clark (C) Fisher (D) Dixon

267. A specific function of light in the process of photosynthesis is(A) Reduction of CO2 (B) Activate other moleculse(B) Split water molecules (D) None of the above

268. C4 plants differ from C3 plants in(A) Number of ATPs consumed per hexose molecule(B) Type of end product(C) Type of pigments(D) Substrate for CO2 in carbon assimilation

269. Main substance involved in transfer of electrons in photosynthesis is(A) Phytochrome (B) Cytochrome (C) FAD (D) Both A and B

270. Ingreen cell the enzyme catalase is localisedin(A) Peroxisomes (B) Chloroplasts (C) Lysosomes (D) Vacuoles.

271. Which one of the following contain agranal chloroplasts?(A) C3 plants (B) Succulents (C) C4 plants (D) Hydrophytes

272. The wavelength of light most absorbed during photosynthesis is(A) 700 nm (B) 660 nm (C) 550 nm (D) 440 nm

273. Which element is required for photosynthetic evolution of oxygen?(A) Cu (B) Fe (C) Zn (D) Mn

274. Pigments of PS I occur in(A) Appressed part of granal thylakoids(B) Stromal thylakoids and nonappressed(C) Both appressed and nonappressed parts of granal thylakoids(D) Stroma

275. Factor which is not normally limiting in photosynthesis is(A) Chlorophyll (B) Light (C) Water (D) CO2

276. Protochlorophyll differs from chlorophyll in lacking(A) 4 hydrogen atoms in two pyrrole rings(B) 2 hydrogen atoms in one of its pyrrole rings(C) 2 hydrogen atoms in two pyrrole rings(D) 1 hydrogen atom in one pyrrole ring.

277. In photosynthesis, photolysis of water is used in(A) Reduction of NADP+ (B) Oxidation of NADP(C) Oxidation of FAD (D) None of the above

278. Number of cell organelles involved in photorespiration is(A) One (B) Two (C) Three (D) Four

279. Photosynthetic synthesis of carbohydrates uses CO2 and(A) Water in presence of sunlight with the help of chlorophyll(B) Water in the presence of energy(C) Water with the help of chlorophyll(D) Presence of sunlight

PHOTOSYNTHESIS-21

280. Photosynthesis occurs in(A) Leaves (B) Leaf cells (C) Plants (D) Chloroplasts

281. Maximum photosynthesis occurs in(A) Blue light (B) Red light (C) Green light (D) White light

282. Special feature of C4 plants is(A) Thin cuticle (B) Multilayered epidermis(C) Kranz anatomy (D) Both A and B

283. Which of the following contains copper?(A) Quinone (B) Plastoquinone (B) Plastocyanin (D) Cyt b5

284. Condition favouring cyclic photophosphorylation is(A) Anaerobic environment (B) Aerobic and low light intensity(C) Aerbic and optimum light (D) Anaerobic and low light intensity

285. Wavelength of visible light /PAR is(A) 200-400 nm (B) 400-700 nm (C) 700-900 nm (D) 100-200 nm

286. The pigment present universally in all green oxygenic plants is(A) Chlorophyll a (B) Chlorophyll b (C) Chlorophyll c (D) Chlorophyll d

287. Carbon dioxide is fixed in(A) Light reaction (B) Dark reaction(C) Aerobic respiration (D) Anaerobic respiration

288. Direction of conduction of food through pholem is(A) From below upwards (B) From tip to bottom(C) From leaves to roots (D) Phloem never conducts food.

289. In photosynthesis, oxygen is liberated during(A) Hydrolysis of carbohydrates (B) Breakdown of proteins(C) Reduction of CO2 (D) Hydrolysis of water

290. Radioactive tracer studies with 14C have shown that(A) Phloem transports organic nutrients (B) Phloen transports inorganic nutrients(C) Xylem transports inorganic nutrients (D) Xylem transports organic nutrients

291. Light reaction of photosynthesis is also called(A) Calvin cycle (B) Hill reaction (C) TCA cycle (D) All the above

292. Protoplasmic streaming theory of translocation of organic solutes was first proposed by(A) Van den Honert (B) Cany and Thaine (C) De Vries (D) Curtis

293. In Maize, mesophyll cells perform photosynthetic cycle(A) C4 (B) C3 (C) C2 (D) C1s

294. Three carbons of phosphoglyceric acid formed during carbon fixation are derived from(A) PEP + CO2 (B) RuBP (C) CO2 (D) RuBP + CO2

295. Ferredoxin in(A) Phenol (B) Protein (C) Fat (D) Carbohydrate

296. Green plants do not give out CO2 during day time because they(A) Store the same (B) Respire very slowly(C) Do not respire (D) Consume it in photosynthesis

297. Cytochrome b6 and cytochrome f occur in(A) Ribosomes (B) Mitochondria (C) Chloroplasts (D) Lysosomes

298. One of the following is a C4 plant(A) Sugarcane (B) Tomato (C) Mango (D) Apple

299. For fixing one molecule of CO2 in Calvin cycle, are required(A) 3 ATP + 1 NADPH2 (B) 3 ATP + 2 NADPH2(C) 2 ATP + 3 NADPH2 (D) 3 ATP + 3 NADPH2

300. Enzyme required in early CO2 fixation in C4 cycle is(A) RuBP carboxylase (B) RuBP oxygenase(C) PEP carboxylase (D) PGA dehydrogenase

PHOTOSYNTHESIS-22

EXERCISE - III1. First reaction in photosynthesis is

(A) Photolysis of water (B) Excitation of chlorophyll molecules(C) Formation of ATP (D) Fixation of CO2

(C.B.S.E. 2000)2. Which of the following occurs in dark reaction of photosynthesis?

(A) Formation of ATP (B) Release of O2(C) Release of H2 (D) Synthesis of PGA/PGAL

(A.F.M.C. 2000)3. Process of assimilation of CO2 to products carbohydrates is

(A) Oxidative (B) Catabolic (C) Reductive (D) All the above(J.K.C.M.E.E. 2000)

4. Starch is stored in potato tuber as(A) Sugar is synthesised in leaves(B) sugar is transported form leaves to tubers(C) In the tuber sugar is changed to starch(D) All the above

(C.P.M.T. 2000)5. Evidence for liberation of O2 from water during photosynthesis comes from

(A) Release of 18O if water contains the same(B) Isolated chloroplast supplied with reducing agent like potassium ferrocyanide evolves O2 evenin absence of CO2(C) Photosynthetic bacteria do not liberate O2 and they use H2S for obtaining reducing power(D) All the above

(J.I.P.M.E.R. 2000)6. Chemical which absorbs light energy and changes it do chemical energy is

(A) Xanthophyll (B) Chlorophyll a (C) Chlorophyll b (D) Chlorophyll c(A.I.I.M.S. 2000)

7. Anatomy of C4 plant leaf shows(A) Presence of peroxisomes (B) Presence fo bundle sheath cells(C) Absence of mitochondria (D) Absence of bundle sheath cells

(Har. P.M.T. 2000)8. Hill used a dye for his famous Hill reaction

(A) Sulphur green (B) Eosine(C) Methylene blue (D) Dichlorophenol indophenol

(Har. P.M.T. 2000)9. Carotenes protect plants from

(A) Photooxidation (B) Desiccation (C) Photorespiration (D) Photosynthesis(Har. P.M.T. 2000)

10. Noncyclic photophosphorylation differs from cyclic photophosphorylation in that the latter has(A) Only PSI (B) Evolution of oxygen(C) Reduction of NADP+ (D) Both B and C

(Orissa 2000)11. Which one is dephosphorylation

(A) Fructose-1-phosphate Fructose, 1,6-biphosphate(B) Fructose 1, 6-biphosphate Fructose 1-phosphate(C) Fructose 1-phosphate Fructose 6-phosphate(D) Glucose 6-phosphate Fructose 6-phosphate

(B.U. 2000)

PHOTOSYNTHESIS-23

12. Pigment system connected with oxidation of water is(A) Photosystem I (B) Photysystem II (C) Phycobilisome (D) Carotenoids

(J.I.P.M.E.R. 2000)14. ATP molecules required to synthesise one molecule of glucose by C4 pathway are

(A) 12 (B) 18 (C) 24 (D) 30(E) 36

(Kerala 2000)15. Most widely accepted theory of carbohydrate translocation is

(A) Mass flow theory (B) Root pressure theory(C) Inbibition theory (D) Transpiration theory(E) Osmotic theory

(Kerala 2000)16. The hypothesis that all photosynthetic organisms require a source of hydrogen was given by

(A) Hill (B) Ruben and Kamen(C) Van Niel (D) Emerson and Arnold(E) Hatch and Slack

(Kerala 2000)17. In C3 plants, first carbon dioxide acceptor enzyme is

(A) PEPCO (B) RuBP carboxylase (C) RuBP oxygenase (D) Oxidase(R.P.M.T. 2000)

18. Rate of photosynthesis will be higher in(A) Green light (B) Blue light (C) Red light (D) Intermittent light

(B.V. 2001)19. Calvin discovered

(A) Light reactions of photosynthesis (B) Dark reactions of photosynthesis(C) EMP (D) Krebs cycle

(B.V. 2001)20. Scientist awarded Nobel Prize in 1960 for tracing the path of carbon in photosynthesis was

(A) Hatch (B) Huber (C) Calvin (D) Ruben(E) Blackman

(Kerala 2001)21. Number of organelles required for photorespiration is

(A) One (B) Two (C) Three (D) Four(A.I.I.M.S. 2001)

22. Blackman’s law was conceived in connection with(A) Photosynthesis (B) Respiration (C) Transpiration (D) Root pressure

(A.I.I.M.S. 2001)23. First stable product of C4 photosynthesis is

(A) Phosphosglyceric acid (B) Ribulose 1, 5-biphosphate(C) Malic acid (D) Phosphoglyceraldehyde

(Karnataka 2001)24. Which one does not take part in electron transfer

(A) CoQ (B) FeS (C) ATP (D) NAD+

(Karnataka 2001)25. In presence of high concentration of oxygen, RuBP carboxylase converts RuBP to

(A) Malic acid and PEP (B) PGA and PEP(C) PGA and malic acid (D) PGA and phosphoglycolate

(H.P.P.M.T. 2001)

PHOTOSYNTHESIS-24

26. Photolithotrophs (photoautotrophs) obtain energy from(A) Radiations and carbon from inorganic compounds(B) Radiations and carbon from organic compounds(C) Organic compounds(D) Inorganic compounds

(C.B.S.E. 2001)27. Loading of phloem means

(A) Elongation of phloem cells (B) Separation of phloem parenchyma(C) Strengthening of phloem fibres (D) Pouring of sugar into phloem

(C.B.S.E. 2001)28. Which pair is wrong

(A) C3 - Maize (B) Calvin cycle PGA(C) Hatch and Slack cycle OAA (D) C4 - Kranz anatomy

(C.B.S.E. 2001)29. Which one is product in respiration and reagent in photosynthesis

(A) O2 (B) CO2 (C) CO (D) N2(A.M.U. 2001)

30. PS I and PS II occur over(A) Grana of chloroplast (B) Matrix of mitochondria(C) Stroma of chloroplast (D) Inner membrane of mitochondrion

(M.P.P.M.T. 2001)31. A photosynthetic cell is provided with 14CO2 and 18

2H O. They form(A) C6H12O6 + O2 (B) 14C6H12O6 + O2(C) 14C6H12O6 + 18O2 (D) C6H12O6 + O2

(A.M.U. 2001)32. Ground substance of chloroplast is

(A) Stoma (B) Stroma (C) Granum (D) Cisterna(M.H. 2001)

33. C4 and C3 pathway of CAM plants are separeated by(A) Bundle sheath(B) Mesophyll and bundle sheath cells(C) Mesophyll and bundle sheath chloroplasts(D) Time

(M.H. 2001)34. Steps in noncyclic photophosphorylation include passage of electrons along

(A) FRS FD Cytb6 Cyt f PC Chl a(B) Chl a Cytb6 Cyt f PC PS I FRS FD(C) Chl a PQ Cytb6 Cyt f PC PS I FRS FD(D) PQ Cytb6 Cyt f PC PS I FRS FD

(M.H. 2001)35. PEPco is associated with

(A) C3 plants (B) CAM plants (C) C4 plants (D) Both B and C(Uttaranchal 2001)

36. PEP, the first CO2 acceptor in C4 cycle is(A) 3 - C compound (B) 4 - C compound(C) 5 - C compound (D) 6 - C compound

(Har. P.M.T. 2001)37. Law of limiting factor is

(A) Law of maximum (B) Law of minimum(C) Law of optimum (D) All the above

(Har. P.M.T. 2001)

PHOTOSYNTHESIS-25

38. The sequential order in electron transport from PS II to PS I of photosynthesis is(A) FeS, PQ, PC and Cytochrome (B) FeS, PQ, Cytochromes and PC(C) PQ, Cytochromes, PC and Fes (D) PC, Cytochromes, FeS, PQ

(Tamil Nadu 2001)39. The compound formed as net gain in carbon assimilation is

(A) 3-C DiHAP of third CO2-fixation(B) GAP of second CO2 fixation(C) Erythrose 4-phosphate reacting with DiHAP(D) RuBP

(Tamil Nadu 2001)40. Dimorphic chloroplasts occur in

(A) Pea (B) Mango(C) Sungarcane (D) Cotton

(M.H. 2002)41. Reaction centre of photosynthesis is formed of

(A) Chl b (B) Chl a (C) Carotene (D) Xanthophyll(M.H. 2002)

42. Noncyclic photophorylation involves(A) PS I only (B) PS II only (C) Stroma matrix (D) Both A and B

(M.H. 2002)43. Who found that organic matter is synthesised with the help of solar energy

(A) Hill (B) Van Steil (C) Mayer (D) Bayer(Har. P.M.T. 2002)

44. What is correct(A) Chl a is blue green, C55H70O6N4Mg(B) Xanthin is C40H56(C) Chl a is blue green, C55H72O5N4Mg(D) Chl b is yellow green, C55H70O5N4Mg

(B.V. 2002, 2003)45. In photosynthetic electron transport system, Mn ions are associated with

(A) CF0 - CF1 complex (B) Cyt b6 - Cyt f complex(C) Oxygen evolving complex (D) Plastoquinone

(A.P.M.E.E. 2002)46. During photosynthesis

(A) O2 comes form CO2(B) ATP is formed(C) ATP is not formed(D) Water is not required as reactant but only as a medium

(C.P.M.T. 2002)47. First transitory chemical formed by reaction between CO2 and RuBP is

(A) PGAL/GAP (B) PGA(C) 2-carboxy 3-keto, 1,5-biphosphoribotal (D) DiHAP

(J.K.C.M.E.E. 2002)48. Red colour of tomato is due to

(A) Lycopene (B) Phytochrome (C) Chromatochrome (D) Anthocyanin(C.P.M.T. 2002)

49. Electrons lost by PS II are regained from(A) O2 (B) CO2 (C) H2O (D) None of the above

(C.P.M.T. 2002)

PHOTOSYNTHESIS-26

50. Percentage of radiant energy entering reaction site in photosynthesis which is converted into po-tential energy is(A) 10% (B) 35% (C) 20% (D) 42%

(B.H.U. 2002)51. Movement of materials through vascular tissues of plants is

(A) Transpiration (B) Transcription (C) Transduction (D) Translocation(B.H.U. 2002)

52. Chlorophyll appears green because it(A) Reflects green light (B) Transmits green light(C) Absorbs green light (D) Transforms green light

(karnataka 2002)53. In photosynthesis, energy for passage of electron is the one that is absorbed by

(A) Chlorophyll (B) RuBP (C) Water (D) ATP(C.B.S.E. 2002)

54. Energy from light reaction is transferred to dark reaction in the form of(A) ADP (B) ATP (C) Chlorophyll (D) RuBP

(C.B.S.E. 2002)55. ADP ® ATP reaction occurs when two protons (H+) are passed from

(A) Thylakoid to cytosol (B) Thylakoid to lumen(C) Lumen of thylakoid to stroma (D) Stroma to thylakoid lumen

(Manipal 2002)56. What is ture?

(A) PEP-pyruvate causes substrate level phosphorylation(B) PS II has oxygen producing complex(C) NADPH is assimilatory power(D) All the above

(Manipal 2002)57. ETC of photosynthesis process is

(A) Bound to thylakoid membrane (B) Present in stroma(C) Bound to outer chloroplast membrane (D) Dispersed in cytosol

(J.I.P.M.E.R. 2002)58. Maximum starch is manyfactured by

(A) Spongy parenchyma (B) Palisade parenchyma(C) Guard cells (D) Vascular tissue

(J.I.P.M.E.R. 2002)59. The process by which excess energy is lost is

(A) Fluorescence (B) Photooxidation(C) Photolysis (D) Photophosphorylation

(J.I.P.M.E.R. 2002)60. Maximum photosynthesis occurs in light

(A) Red (B) Green (C) Very high light (D) Continuous light(A.F.M.C. 2002)

61. Which one is photophosphorylation(A) ADP + AMP energyLight ATP(B) ADP + Inorganic PO4 energyLight ATP(C) ADP + Inorganic PO4 ATP(D) AMP + PO4 energyLight ATP

(C.B.S.E. 2003)

PHOTOSYNTHESIS-27

62. Stomata of CAM plants(A) Are always open(B) Open during day and close at night(C) Open during night and close during day(D) Never open

(C.B.S.E. 2003)63. In sugarcane, 14CO2 is fixed in malic acid. The enzyme is

(A) RuBP carboxylase (B) PEP carboxylase(C) Ribulose phosphate kinase (D) Fructose phosphatase

(C.B.S.E. 2003)64. Which one is wrong in photorespiration?

(A) It occurs in chloroplasts (B) It occurs in day time only(C) It is characteristic of C4 plants (D) It is characteristic of C3 plants

(C.B.S.E. 2003)65. Which ones are primarily absorbed by carotenoids?

(A) Blue and green (B) Green and red(C) Red and voilet (D) Voilet and blue

(C.B.S.E. 2003)66. Basic feature of Kranz anatomy of C4 plants

(A) Presence of chloroplasts in bundle sheath cells(B) Presence of chloroplasts in mesophyll and epidermal cells(C) Presence of typical granal chloroplasts in bundle sheath cells and rudimentary chloroplasts inmesophyll cells(D) Presence of rudimentary chloroplasts in bundle sheath cells and typical granal chloroplasts inmesophyll cells

(Karnataka 2003)67. A decrease in photosynthetic rate with increased availability of oxygen is called

(A) Warbing effect (B) Richmond Lang effect(C) Blackman’s Law of limiting factors (D) Emerson’s enhancement effect

(Karnataka 2003)68. Photorespiration in C3 plants starts from

(A) Phosphoglycerate (B) Phosphoglycolate(C) Glycerate (D) Glycine

(A.I.I.M.S. 2003)69. Hill reaction occurs in

(A) High altitude plants (B) Total darkness(C) Absence of water (D) Presence of ferricyanide

(A.I.I.M.S. 2003)70. Food manufactured in leaves is passed out to other parts of the plant throgh

(A) Phototaxis (B) Translocation (C) Descent of sap (D) Chemotoxis(J.I.P.M.E.R. 2003)

71. In CAM plants, organic acid content(A) Decreases during night (B) Increases during day(C) Increases during night (D) Both A and B

(B.V. 2003)72. Photoautotrophs lacking chlorophyll aare

(A) Cyanobacteria (B) Red algae (C) Brown algae (D) Bacteria(C.P.M.T. 2003)

73. Amount of CO2 fixed annually is about(A) 70 x 1010 kg (A) 70 x 1011 kg (A) 70 x 1013 kg (A) 70 x 1013 g

(Pb. P.M.T. 2003)

PHOTOSYNTHESIS-28

74. Plants showing C4 photosynthesis have(A) Granal bundle sheath chloroplasts and agranal mesophyll chloroplasts(B) Agranal bundle sheath chloroplasts and granal mesophyll chloroplasts(C) Both bundle sheath and mesophyll chloroplasts are agranal(D) Both the types of chloroplasts are granal

(B.V. 2003)75. Electron acceptor of PS II is

(A) Cyt b (B) FRS (C) PQ (D) NADP+

(B.V. 2003)76. C4 plants have carboxylations

(A) One (B) Two (C) Three (D) Four(C.P.M.T. 2003)

77. Potted plants are not allowed to remain in room of a patient during night as(A) They consume O2 at night(B) Produce CO2 at night(C) They release O2 only during day(D) They are unable to photosynthesize and deplete CO2 of the room at night

(J.I.P.M.E.R. 2003)78. Excitation of chlorophyll by light is

(A) Exergonic reaction (B) Anabolic reaction(C) Photochemical reaction (D) Photooxidation reaction

(J.I.P.M.E.R. 2003)79. PS I has

(A) More chlorophylls and more accessory pigments(B) More chlorophylls and less accessory pigments(C) Less chlorophylls and more accessory pigments(D) Less chlorophylls and less accessory photosynthetic pigments

(J.I.P.M.E.R. 2003)80. Plants living in hot humid environment are

(A) C3 plants (B) CAM plants (C) C4 plants (D) All the above(A.M.U. 2003)

81. pH of phloem sap is(A) 8.7 - 9.6 (B) 7.5 - 8.6 (C) 5.0 - 6.0 (D) 2.4 - 0.8

(A.M.U. 2003)82. The characteristics of C4 plants is (a) Kranz anatomy (b) First product oxaloacetic acid (c) Car-

boxylating enzymes are PEPco and Rubisco(A) a and b but not c (B) b and c and not a(C) a and c but not b (D) All a,b and c

(J.K.C.M.E.E. 2003)83. In photorespiration, glucolate is converted into serine and CO2 in

(A) Mitochondria (B) Chloroplasts (C) Vacuoles (D) Peroxisomes(A.I.E.E.E. 2003)

84. A cell that lacks chloroplasts does not(A) Require water (B) Evolve carbon dioxide(C) Liberate O2 (D) Utilise carbohydrates

(A.I.E.E.E. 2003)85. Which is not true of C4 pahtway

(A) It raquires more energy than C3 pathway (B) There is little photorespiration(C) CO2 acceptor is 3-C compound (D) It is inhibited by high CO2 concentration

(A.I.E.E.E. 2003,2004)

PHOTOSYNTHESIS-29

86. Emerson effect is connected with(A) Photosynthesis (B) Respiration(C) Transpiration (D) Absorption of water

(Kerala 2003)87. Photosynthesis is maximum in

(A) Blue light (B) Red light (C) Green light (D) Both A and B(E) UV light

(Kerala 2003)88. Rubisco is enzyme for

(A) Regeneration of RuBP (B) Photolysis of water(C) CO2 fixation (D) All the above

(Orissa 2003)89. Noncyclic photophosphorylation produces

(A) NAD+ (B) NADH (C) NADPH (D) NADP+

(Orissa 2003)90. In electron transport system, the last electron acceptor of photophosphorylation is

(A) NADPH (B) NADP+ (C) Atomic oxygen (D) Chlorophyll a(C.P.M.T. 2003)

91. As compared to sun plants, plants adapted to low light intensity possess(A) High rate of CO2 fixation (B) Larger photosynthetic unit(C) More extended root system (D) Spiny leaves

(C.B.S.E. 2004)92. Which is not an electorn carrier

(A) CoQ (B) Cyt c (C) Cyt a (D) H2O(E) Cyt a3

(Kerala 2004)93. Photolysis of water by isolated chloroplasts was demonstrated by

(A) Hill (B) Von Niel (C) Liebig (D) Calvin(A.I.E.E.E. 2004)

94. How many molecules of glycine are required to release one molecule of CO2 in photorespiration(A) One (B) Two (C) Three (D) Four

(A.F.M.C. 2004)

PHOTOSYNTHESIS-30