Paper 1 Time: t hour 15 minutes

Instruction: For Question I to Question 5Q each question is followed by four options. A'8, CqndD, Choose o;ne correct answer for each question and blacken the corresponding space in yourobjectiue (rnswer sheet.

Section A

I Figure 1(i) and Figure l(ii) show the structures of an amoeba and a plant cell.

-

wxY

2 Which of the following organelles containschromosomes?A NucleusB RibosomesC MitochondrionD Golgi body

3 Figure 2 shows the structure of a cellorganelle.

P

aR

S

Which cell does noat possess the organelleshown in Figure 2?

A Guard cellB Epidermal cellC Spongy mesophyll cellD Palisade mesophyll cell

Which substance acts as the medium forchemical reactions in the cell?A WaterB GlucoseC Fatty acidD Amino acid

Figure 1(i) Figure l(ii)

Which of the structures on Figure 1(i) and Figure 1(ii) have the same function?A WandPB XandQC Yand RD ZandS

Figure 2

r.iffi ..";3trrerctrL:]ffij' .:T-

5 Figure 3 shows a comparison of ion concentration in pond water and in the cell sap ofNlfellosp.

Concerrfationof ions

f]] Pond water

@ Cett sap of Niterro sp

Figure 3

Which process causes the ion concentration in Nirello sp. to be higher than that in pond water?A OsmosisB Plasmolysis

C Active transportD Passive transport

6 Figure 4 shows a stage during mitosis in a plant cell.

A I and II onlyB III and IV only

Figure 4

Which of the statements about the cell in Figure 4 is not true?A The cell produces diploid daughter cellsB The cell is at anaphaseC The cell is found at the apical meristemD The cell has eight chromosomes at interphase

Which of the following processes in plants need energy?I Mitosis

II Water diffusionIII Growth of pollen tubeIV Mineral salts absorption

C I, III and fV onlyD I, II, III and IV

Mineral

I

Figure 5 shows the molecular structure ofthree food classes.

Figure 5

Which food classes do X, Y and Z belong to?

Hot waterEthanol

What is the aim of the step in Figure 6?A lb dissolve the chloropyllB To soften the leafC To extract the starchD lb break down the cell wall

11 Which of the following organisms is asaprophyte?AB

ABcD

x Y Z

CarbohydrateProteinProteinLipid

ProteinLipidCarbohydrateCarbohydrate

LipidProtein

9 Four different food tests were carried out ona food sample. The results are shown inTable 1.

Testtutre

Test carriedout Observation

1

2:J

Biuret testBenedicts testIodine testDCPIP test

Violet solutionBlue solutionDark blueColourlesssolution

Table I

The food sample containsI proteiniI starchlll litan.rin Ci\' reducing sugar-{ I and IV onlyB II and III onlyC I. II and III onlyD I. II. III and IV

lt-t i:.-:rr 6 shorr',. a step in the procedure to:-.:.::trch in a leaf.

Wrich enzyme needs an acidic medium forits reaction?A ArnylaseB TiypsinC PepsinD Erepsin

C

x

ffi

i$$}Z

fh\zrnz\,tl l^-".^ /t l,.'r.',,^.r-

t2

13

t4

Which ofthe following arteries carries bloodwith the lowest oxygen concentration?A Renal arteryB Hepatic arteryC Mesenteric arteryD Pulmonary artery

Figure 7 shows a three dimensional sectionof a dicotyledon stem.

Figure 7

What are the tissues found along X---------Y?A Pith, xylem, cambium, phloem, cortex,

epidermisB Pith, phloem, cambium, xylem, cortex,

epidermisC Cortex, xylem, cambium, phloem, pith,

epidermisD Cortex, phloern, cambium, xylem, pith,

epidermis

What causes the shoot of a plant to growtowards light?A The shoot needs light for photos)'nthesisB The shoot needs to grow longer to avoid

competition for lightC The cells shaded from light elongate

fasterD The concentration of auxin is higher in

cells exposed to light

:::::::i:i::

16 Figure 8 shows part of human forelimb.

Figure 8

What are P, Q, R and S in Figure 8?

P a R S

UlnaScapulaHumerusScapula

LigamentLigamentTendonTendon

BicepsBicepsTticepsTliceps

HumerusRadiusUlnaRadius

l7 Fizure 9 shows a human lumbar vertebra.

Figure g

What is the function of X and Y in Figure9?A Protection for spinal cordB Surfaces for muscle attachmentC Surfaces for vertebral jointsD Surfaces for rib articulation

ABcD

l5

8.00 a.m. 8.00 p.m.

l8 Figure 10 shows a plant responding to astimulus.

Figure l0

What type of plant response is shownFigure 10?A PhotonastyB ThermonastyC ThigmonastyD Seismonasty

Figure 11 shows the different levelshorrnone X during a menstrual cycle.

Figrue ll

What is hormone X in Figure 11?

A OestrogenB ProgesteroneC Luteinizing hormoneD Follicle stimulating hormone

Figure 12 shows the structure of a s)'napticknob.

, :: i:i:i:ii:i=

What is the structure P and its function?

Structure Function

Mitochondrion Generates energy totransmit irnpulsesacross synapse

Mitochondrion Tlansfers impulsesto cell bodv

Vesicle Secretesneurotransmitter

Vesicle TYansfers impulsesto synaptic knob

2l Which of the following statements are trueabout double fertilisation in a plant?I One rnale gamete nucleus fuses with

the nucleus of an egg cell to form anembryo sac

II TWo haploid nucleii formed in the ovulefuse with two male gamete nucleii

III One male ganeter nucleus fuses withthe female nucleus to form a diploidzygote

IV TWo polar nucleii fuse with one malenucleus to form the endosperm

A I and II onlyB III and IV onlyC I, II and III onlyD II, III and IV only

Figure 13 shows genes in a pair ofhomologous chromosomes.

Figure I

Which ofthe following statements regardingthe homologous chromosomes are true?

A

D

tn

ofl9

28Time /days

14

B

B3

D

E

'.4FcH

Figure 12

l1

I Energy trait is controlled by a pair of allelesiI The chromosone pair controls five traitsILI One is a maternal chromosome while the other is a paternal chromosomeI\- D. e, f, g and H are possible which may be found in the chromosomes of a daughter cell

after a mitotic division-{ I and IV only C I, II and IV onlyB II and III only D I, II, III and IV

!3 \\-hich of the following defects is not caused by gene mutation?A Albinism C Downs syndromeB Haemophilia D Sickle cell anaemia

!{ Figure 14 shows a pyramid of numbers.

Figure 14

\\:hich of the foilowing is not true about the organisms in the pyrarnid in Figure 14?

w X Y

HolophyticAutotrophicFirst trophic levelProducer

HolozoicAutotrophicSecond trophic levelPrimary consumer

HolozoicHeterotrophicThird trophic levelSecondary consumer

HolozoicHeterotrophicFourth trophic levelTertiarv consumer

5 \\that is the correct sequence of ecological change that occurs to a barren land over a long periodof time?A Colonization, climax community, successionB Succession, colonization, climax communityC Colonization, succession, climax communityD Succession, climax community, colonization

Section B

26 A student soaked a duck egg in a saturated salt solution. After a few days, he found that theegg tasted salty.\lrhich of the following statements explain this phenomenon?I The egg shell and nembrane are permeable to saltII Salt particles diffuse into the eggIII Salt particles enter the egg by active transportIV Saturated salt solution is hypertonic to the eggA I and IV only C I, II and IV onlyB II and III only D I, II, III and IV

ABCD

Y

X

pancreas?

2927 Which of the following graphs bestrepresents the effect of pH on the rate ofreaction of enzymes secreted by the

14 pH

Which cell is a product of a meiotic celldivision?

o4>^'(D

30 Figure 16 shows an experiment on anaerobicrespiration in yeast.

R

U

O 7 14 pH 0 7 14 pH paralayer

28 Figure l5 shows how an enzyme works.

C

o9

frz

ffiF @ffi8Figure l5

Which property of an enzyme is shown inFigure 15?A Enzyme reaction is specifrcB Enzyme reaction is affected by pHC Enzyme reactiion is affected by

temperatureD Enzyme structure changes at the end of

reaction

Thermometer

Boiledglucosesolutionwith yeastculture

Thermos-flask

Lime-water

Figure 16

Which ofthe following are observed after 30minutes?

A X and Y only CXandZonlyB Y and Z only DX,YandZ

3l Figure 17 shows gaseous exchange at an alveolus.

\ \\-R\\\.i,.

Figure 17

Which of the following is true about blood vessels R, S and T?

15

2

x Temperature in thernos-flask increases

Y Lime-water turns cloudy

7, Gas bubbles are released

A

B

C

D

.!c

"otr

32 Figure 18 shows the concentration ofantibody in the blood after two injections ofantiserum.

Which of the following does not have thetissue in Figure 19?

c //,86l\,4"

6A_NFigure 20 shows an experiment of barkringing on a branch.

trIFirst Second

injection injectionFigure 18

Time AVeek

What type of immunity is shown in Figure18?A Acquired active immunityB Acquired passive immunityC Natural active immunityD Natural passive immunity

33 Figure 19 shows some cells from a tissue.

sto'€

R S T

Contains blood withhigh concentration ofoxygen

Allows oxygen todiffuse intr thealveolus

Contains blood withhigh concentration ofcarbon dioxide

Contains blood withhigh concentration ofoxygen

Allows carbon dioxideto diffuse into thealveolus

Contains blood withhigh concentration ofcarbon dioxide

Contains blood withhigh concentration ofcarbon dioxide

Allows carbon dioxideto diffuse into thecapillary

Contains blood withhigh concentration ofoxygen

Contains blood withhigh concentration ofcarbon dioxide

Allows oxygen todiffuse into thecapillary

Contains blood withhigh concentration ofoxygen

Figure

77

Figure 20

Which of the following is the condition ofthe branch after six weeks?

c

"l w*"WK

Ye],{<35 Figure 21 shows the pathway of an impulse

in a reflex are.

Figure 21

Which statement is true in Figure 21?

A J receive an impulse direct from L andcarries it to N

B L transmits the impulse to M from thecentral nervous system

C The rate of impulse transmissionthrough K increases

D N causes the frnger to react

i6 ldentical twins are produced frorn thefertilisation of one sperm and one ovum.\l-hich ofthe following twins is not the resultof such fertilisation?

37 Figure 22 shows two types of variation in

Figure 22

Which of the following are examples ofvariation for type P and type Q?

TVpe P Tlpe Q

Tlpe of earlobe

Body weight

Height Blood tlpe

Eye colour Ability to roll thetongue

Tlpe of hair Skin colour

Figure 23 shows a mangrove swamp at themonth of a river in the year 1970.

Muddy beach

Avicennia

Rhizophora

Brugueira

Sonneratia

Tfopical rainforest

€

.oc

z

d

E

z

A

B

C

D

KeyIll.tl,rlt;;;lt"""1

[rir;t;tE:47,4/).)7'a2az

2A

g=jzlt-+-'-rr.rlr:-+-+ -+- r -i--r-:Z!bj\ '

I '

I

,s. A

WH19

Figure

the year 2010?

x

Which of the following would represent thepossible zonal shift at the river mouth in C

40 Figure 24 shows an area of human activity?

\Vhat is the effect on the river ecosystembased on the main activity shown in Figure24?A Number of trophic levels in a food chain

increaseB AJgaJ growth in the river incrt.ase'sC BOD of the water decreasesD Temperature of the water increase

B

D

39 Which organism is classified in theProkaryote kingdom? yn //.- ri, s )p<q---J 6ed)\-__i,_-/ Kry

4l Figure 25 shows a cell.

Figure 25

Which organelle is foundthe cell shown in Figure

Section C

in abundance in25?

42 Figure 26 shows an experiment on themovement of molecules across a semi-permeable membrane.

Beginning of the experiment

Mskingtubing

Solution

the experiment

Viskingtubing

a 7.-q9 B vW

Tlbe M

End of

mt-l€1F-tr:]t&-lr#1w

T[be M

Electricity generating station

Trrbe N

D

21

Figure 26

P a R

1 mol dm-3sucrosesolution

Distilledwater

0.5 mol dm3sucrosesolution

1 rnol dm 3

sucrosesolution

0.5 mol dmasucrosesolution

Distilledwater

Distilledwater

1 mol dm'3sucrosesolution

0.5 mol dnssucrosesolution

Distilledwater

0.5 mol dmrsucrosesolution

l mol dm3sucrosesolution

A

B

What are solutions R Q and R? Which of the characteristics is true aboutthe blood circulatory system both in manand the animal in Figure 28?A Heart pumps out a rnixture of

oxygenated and deoxygenated bloodB Blood enters the gaseous exhange organ

at low pressureC It is a double blood circulatory systemD It is a closed blood circulatory system

45 Figure 29 shows the structure ofa nephron.

Figure 29

Which of the following activities cause X tobe more permeable to water?

P - Drinking a lot of waterQ - Eating salty foodsR - Not exercisingS - Playing sports

PandRPandSQandRQandS

In pea plants, the allele for smooth-skinnedseeds is dominant over the allele forwrinkled-skinned seeds. TWo heterozygousplants are cross-bred.

What is the chance ofan offspring producingsmooth-skinned seeds?

C 75V"D 1007a

c

,

s-1-r

I

D

Figure 27

\\hich of the following will result if X isremoved?A Lipase is not producedB Fats will not be digestedC Proteins will not be digestedD Pancreatic juice does not reach the

duodenum

Figure 28 shows a blood circulatory systemof an animal.

ABCD

I...\i:3\---)0)

=t,/

Heart

Blood capillariesin gaseousexchange organs

Bloodcapillariesin bodytissue

A 257o

B 50%

Figure 27 shows part ofthe human digestive

23

47 Figure 30 shows albinism in the pedigree of 49 Table 2 shows the results of an experimentto study the population of garden snails ina vegetable farm.

Table 2

What is the approximate population of thesnails in the farm?A 125B 320c 330D 520

Figure 32 shows a dichotorrous key foranimals.

Organism

Segmentedbody

/\/\

Wiih Withoutappendages appendages

R S

Figure 32

Which of the follorving is most probably P,

Q, R and S?

Kev:

EI o

o

lndividual Q

Normal female

Albino female

Figure 30

Albinism is controlled by a recessive allele, a.What are the genotypes of individual P andindividual Q?

Individual P Individual QAa Aa

.{4. Aa

Aa aa

aa

48 Figure 31 shows the results of blood grouptests from donors P, Q, R and S.

Key: @ Agglutination Q No agglutination

Figure 3l

Which of the following recipient's bloodgroups are compatible with their donors?

Donor Recipient's blood groupP A, B, O and AB

a Q and AB

R AandBS AandO

With Withoutshell shell

IIJPQ

B

C

A

AB

C

D

Capture Number of gardensnails captured

First 200 were marked

Second 50 marked 80 unmarked

Normal male

Albino male

/Non-segmented

body

/t\

AB

C

D

Donor Anti-A Anti-B

P o oa 4.-'l\

R o @S o

P a R S

Gardensnail

Squid Cockmach Earthworm

Squid Snake Ant Prawn

Gardensnail

Earthworm Prawn Snake

Snake Squid Cockroach Earthworn

25

D

r'

5u estSPM EXAMINATION PAPER 2OO3

Paper I1D 27C 8r3 Il t419B2025C263r D A237838438 44.r9 D 50

Paper 2Section AI (Ar (ir

(ii)

(b) (i)rii )

(c ) (i)(ii)

(d) -

C

CBDD

Epithelialcells

3B9Cr5c,IB27833B39A45D

4Ar0A16D22D28434ts40D46C

lt At7B23C29C35D4tD474

6l)12C18A24830D36A42D48A

(ii)

Digestion of starch, peptone, peptides.process of hydro)ysis of fat to fhtty acidsand glycerol is inhitrited.Glucose lcvcl in blood carrnot be rontrolledat normal rangc bccausc cxcess glucostcanrot be convrlrted to glycogcn.The patient has to reduce intake of frxxlthat rich in starch because o{ the absen(eof pancreatic amylase and starch cannotbe digesttri in the small intestine.The patient need to reduee intake ofsugarborause when the pancreas is removed.thc hormonc insulin cannot be produced

(a) (i) Rrbl

(ii ) P

(bl

(iiil

(b) (il

1. Process that plays a lrle in plant andorganisms growth

2. Process thal plays a role in cellrcplaccment in an organism

II,III. I

Telophase

Interph:i$eChmm'rtin will

(il Whorl : Composite(iil Ccnctic factor(iii) Arrang(inrent nnd recombination of gene.

during crossover will produce gametes thatare dillerent geneticallv.

(i) Discontinuousvariati(nr(i i) Ability to rollthe tonguc

Blood groupThumbprint is discontinuous variation and thephotograph is continuous variation for indivntualthat h:r..:,rr" fa,r. r, f,'r Ihe rlenr r.:'l I$ rn

MetaphaseProphase

undergo replication

Enzyrne and protein which needed in celldivision is synthesised

- Cytoplasnr and the nunrber of organt'lksuch as mitochondria will increase

Cell from cow which is required is chosenThen. the nucleus is removed from the cellThe rrvum liom another cow is taken and alsoits nucleus is rem0vedThe nucleus Iiom the cow is then inject€d to t.hedenucleated ovum and ovum is left to undergomitosisThe cells that arc producc are transferrcd tothe surrogate mother to develop normally untilbirth

tdr The bodt mass is continu.rus variation whercasthumbp nt is discontinul)us variation

- Ilodv nrass is inJlurinct{l by senetic fact{nand envir'r)nment whereas thunlbpriut is onll'inlluenced by genetic lirctor.

(al (ir I)hotosynthesis(ii ) Light eneryy r(rccived l|00 (XX) (X)0 - 100?

60 000 lo0 60 000';ll nrrg] rctsLnrf,

= 00037Because sonre ol the light enorgy is rcflectedby thc out{! su ace ofthe source.Total cnergv l'rom the tissues of herbivorethatcannot be used i-q

= r50O0 lJ0)kJ

= 4 970 k.I(ii) Some of the energy is lost durirg the

processes ol respiration, melabolic andgrorvth ol the herbivore.

The organisfi Pran oxidise ammonia to nitrate, byusing the plant nitrate to nrake p.otein- Because ol'that. il organism P is dcstroyed by the use ol'pesticide, the nitrogenlixation proccss ol plantsuill be unhindered antl producers (plant) cannotmake its own protein-(ii Nenlatodes(ii) l'arasites obtain its nutrient lion1 its host.

Ilencc. when the pamsite in destroyed:produccr, hcrbivorc and carnivore that arehosts can eet sufficieDt nut ent for srowth.d

llloodcapillaries

,i r ,{bsorption ofdigested food,iit Surface area of T has structure that are

folded. increase surface area for al)sorption ofdigested food.

i S is pancreas, removal causes enzymeliplr.s€. amylase, trypsin, hormone glucat'onand in.ulrn cannot bn produ''cd.

242

(d)