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121.Which is the structure of glycerol?

2.Aerobic respiration involves conversion of glucose into pyruvate and conversion of pyruvate into carbon dioxide and water. Where do these processes occur in a eukaryotic cell?

Where glucose is broken downinto pyruvateWhere pyruvate is broken downinto carbon dioxide and waterA.CytoplasmCytoplasmB.CytoplasmMitochondrionC.MitochondrionCytoplasmD.MitochondrionMitochondrion3.In the structure of DNA what binds with cytosine?A.DeoxyriboseB.RiboseC.ThymineD.Adenine

4.What would be the effect of increasing temperature on the rate of photosynthesis in a green plant?A.It increases constantly.B.It increases up to a point and then remains constant.C.It increases up to a point and then decreases.D.It remains constant.

5.The diagram below represents an animal cell.

Which processes occur in the locations labeled?

TranscriptionTranslationRespirationA.IIIIIIB.IIIIIIC.IIIIIIVD.IIIIIIV

6.Which molecule is a monosaccharide?A.RiboseB.GlycogenC.AmylaseD.Glycerol

7.Identify the atoms and ions from the table below.

AtomsIonsA.H+Na+OHClB.FeKCH3COOH2OC.FeH2OCa2+N3 D.NaCINO3

8.What is responsible for the conservation of the base sequence during DNA replication?A.DNA polymerase working on one strand at the same time.B.Unpaired bases always attracting their complementary nucleotides.C.DNA helicase and polymerase are complementary.D.Both strands are identical to each other.

9.Which graph shows the effect of increasing carbon dioxide concentration (CO2) on the rate of photosynthesis?A.

B.

C.

D.

( 10.Which types of enzyme are found in the human digestive system?I.AmylasesII.ProteasesIII.LipasesA.I and II onlyB.I and III onlyC.II and III onlyD.I, II and III

11.Which of the following could be a function of a membrane protein?A.Energy storageB.Enzymatic activityC.Oxygen uptakeD.Thermal insulation

12.During the process of replication, which bond(s) in the diagram of DNA below is/are broken?

A.3B.4, 5C.1, 2, 6, 7D.1, 7, 4, 5

13.What is the maximum number of fatty acids that can be condensed with glycerol?A.OneB.TwoC.ThreeD.Four

14.Which row in the table describes the first stage of cellular respiration?

SubstrateLocationProductProductA.pyruvatemitochondriaoxygenwaterB.pyruvatecytoplasmcarbon dioxideATPC.glucosemitochondriapyruvatewaterD.glucosecytoplasmpyruvateATP

15.Which substance is a base found in RNA?A.RiboseB.ThymineC.AdenosineD.Uracil

16.What type of bond holds the complementary base pairs together in a double helix of DNA?A.Covalent bondsB.Peptide bondsC.Glycosidic bondsD.Hydrogen bonds

17.What role does iron play in living organisms?A.As a component in nucleic acidsB.As a component of lipidsC.As a component of carbohydratesD.As a component of proteins

18.Which diagram correctly illustrates a dipeptide?

19.What are the components of a DNA nucleotide?A.Deoxyribose, a phosphate and one of the bases: adenine, cytosine, guanine or thymineB.Ribose, a phosphate and one of the bases: adenine, cytosine, guanine or uracilC.Deoxyribose, a nitrate and one of the bases: adenine, cytosine, guanine or thymineD.Ribose, a nitrate and one of the bases: adenine, cytosine, guanine or thymine

20.What is the correct sequence of chemicals produced in the anaerobic respiration pathway?A.Lactate pyruvate ethanolB.Ethanol pyruvate glucoseC.Glucose lactate pyruvateD.Glucose pyruvate lactate

21.Why do leaves of plants look green?A.Most of the green light is absorbed by chlorophyll and most of the red and blue light is reflected.B.Most of the blue light is absorbed by chlorophyll and most of the red and green light is reflected.C.Most of the red light is absorbed by chlorophyll and most of the green and blue light is reflected.D.Most of the red and blue light is absorbed by chlorophyll and most of the green light is reflected.

22.How would the following DNA sequence, ACGTTGCATGGCA, be transcribed?A.UGCAACGUACCGUB.TGCAACGTACCGTC.ACGTTGCATGGCAD.ACGUUGCAUGGCA

23.What causes water to have a relatively high boiling point?A.Hydrogen bonds between water moleculesB.Hydrogen bonds between hydrogen and oxygen within water moleculesC.Cohesion between water molecules and the container in which the water is boiledD.Covalent bonds between hydrogen and oxygen within water molecules

24.Which of the following substances are organic?I.LipidsII.WaterIII.Carbon dioxideA.I onlyB.II and III onlyC.I and II onlyD.I, II and III25.The diagram below represents DNA replication. Some of the bases are indicated.In which direction is the replication fork moving and which bases would be needed to replicate the section of DNA shown?

Direction of movement of replication forkBases neededA.Left to rightU, G and CB.Right to leftU, G and CC.Left to rightT, G and CD.Right to leftT, G and C

26.Where in eukaryotic cells is glucose broken into pyruvate, to release energy for use in the cell?A.ChloroplastB.CytoplasmC.MitochondrionD.Nucleus27.In the diagram of a chloroplast below where will the Calvin cycle take place?

A.IB.IIC.IIID.IV

28.Which limiting factor of photosynthesis is shown below?A.Increasing carbon dioxide concentrationB.Increasing temperatureC.Increasing light intensityD.Increasing humidity29.Carbon, hydrogen, nitrogen and sulphur are elements found in living cells. Which is the least common?A.CarbonB.HydrogenC.NitrogenD.Sulphur

30.Which of the following terms correctly describe the molecule below?

I.MonosaccharideII.RiboseIII.CarbohydrateA.I onlyB.I and III onlyC.II and III onlyD.I, II and III

31.A certain gene in a bacterium codes for a polypeptide that is 120 amino acids long. How many nucleotides are needed in the mRNA to code for this polypeptide?A.30B.40C.360D.480

32.What enzyme is used in transcription but not in translation?A.DNA polymeraseB.HelicaseC.ProteaseD.RNA polymerase

33.Which two colours of light does chlorophyll absorb most?A.Red and yellowB.Green and blueC.Red and greenD.Red and blue

MC:

1.A2.B3.A4.C5.C6.A7.D8.B9.B10.D11.B 12.B13.C 14.D15.D16.D17.D18.B19.A20.D21.D 22.A23.A24.A25.D26.B27.A 28.B29.D30.B31.C32.D33.D