biology mutiple choice 2006

8/2/2019 Biology Mutiple Choice 2006

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28. 12. Which of the following would MOST likelyoccur ifenzymes were NOT present in living

cells?If all the trees in a large area afforest weredestroyed by disease, what would be theMOST likely effect on the composition of theair in the long term? .tA) The level of carbon dioxide would .

decrease.The level of carbon dioxide would

increase.Inere would be no change in thecomposition ofthe air.

There would be more oxygen.(C .)

(D)

9. A mature plant cell is different from ama-ture animal cell because it has(Ay a large permanent vacuole(8) mitochondria(C) a nucleus suspended in the cytoplasm(0) a cell membrane

10. The process which moves food through thealimentary canal is called

~ (B)(C)(D)

digestionmasticationperistalsisswallowing

11. Living organisms feed by using simple in-organic substances or by consuming 'com-plex organic substances.Which of the following rows correctlyshows the type of substances used or con-sumed by plants, animals and fungi?

Plants Animals Funl!i(A) Simple Complex Complex

inorganic organic organic(B) Simple Complex Complex

organic organic inorganic(C) Complex Simple Complex

organic inorganic organic@ Complex Simple Simple

(A)(8)(C)

Slow rate of reactionHighrateofreactionReaction requiring higher tempera-tures

No reaction

Which of the following combinations correctlyshows a gas that is a raw material and a gasthat is a product, during photosynthesis.

Rawmaterial ProductA) Oxygen NitrogenB Carbon dioxide NitrogenC OXYgen Carbon dioxideIJ' Carbon dioxide Oxygen

14. Bile empties into the(A)(B)(C )(Pr

stomachcaecumileumduodenum


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21.

4The molecule used to temporarily store theenergy released during the process of respi-ration is(A)(B)(C)~

ADPDNAADHATP

r. Results in persistent coughing andshortness of breath.

There is destruction ofthe alveolarwalls.May result in cancer of the lungs,throat, mouth and oesophagus.Blood pressure is lowered.lnd Il onlyHI and IV onlyI, II and !ITonlyI, II and IV only

22. Which of the following statements aboutciga-rette smoking are correct?

m .I V .

(A)(8)~(0)

II.

Items 23 - 24 refer to the diagrams below whichrepresent some components of blood.

(A) (B)

~~

(C) (D)In answering items 23 - 24, match each itemwith one ofthe options above. Each optionmay be used once, more than once or notat all.

23. Engultlngdisease-causingorganisms~24. Transportofoxygen C


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25. The ureter carries urine from the

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AP kidneytothebJadder(8) collecting tub\l lf>to thepelvis(C) nephrontothecollectingtu bule(0) bladderoutofthebody

26. While the tiltrate passes through the kidneytubule. most of the water moves back into thebloodstream. This makes the filtrat er/more dilute(B) darke r(C) more concentrated(D) paler in colour

27. Which of the following would NOT representa form of excretion in plants?(A) Water vapour diffusing throughep idermis

Tanni ns b ein g stored in dead tissueGases diffusing through stomataStored calcium oxalate crystals inleaves during leaffall

28. Which ofthe following adaptations in p lantsis N OT used to conserve water?(A)(B)

~

Cuticle thicknessLong le avesSmall leavesThoms

29. Which of the following functions areperformed by a rib?L Blood formation ./

I L ProtectionIll, LocomotionIV . Support.(fiJ' Iand Il only-"'(8) Iand IV only(C) II and m on ly~) L!landlVonly

30. The human skeleton can bedivided into twoparts, the axial skeleton and the append i cu la rskeleton. Whichrowinthetablegroupsbonescorrectly?

wal skeletou I Appendkularskeleton(A) Pelvic gi rdle , Sk ul l. humerus,

ribs, fem ur ve rtebral column(8) H umerus, Skull, vertebralfemur, ribs column, pelvic girdle

(C) Pelvic girdle, Vertebral column,hum erus, femur ribs, skull

~ Skull, vertebral H umerus, femur, Iolum n, ribs pelvic g ird le31. Which of the following types of lens will

correct sh or t sightedness?


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32. Whichof thefollowingisNOT involved inthe 35. The following reactions all take place in thereflex action ofthe body known asthe knee- skin.jerk reflex? r. Blood vesselsdilateandconstrict.(A) Spinalcord II. Glands produce sweat.(B) Motorneurone III. Hairerectormusclescontract.(C) Sensory neuronc?Brain These functions relate to the skin's role asan organ for .Items 33 - 34 refer to the diagram of the (A} mechanical protection onlyvertebra below. 5 J 3 + body temperature control only(C) both body temperature control and

sensitivity to the surroundings(D) mechanical protection, body

temperature control and sensitivityto the surroundings

~ The eye is sometimes referred to as aneffector organ because(A) the pupil constricts in the presenceof bright light(B) the rods and cones are stimulated by

light(C) images which fall on the retina are33. What type of vertebra is represented? sent to the brain

< J 6 (D) neurones from the eye lead to theCervical central nervous system(B) Lumbar(C) Thoracic 37. The diagram below represents the growth(D) Sacral curve of a culture of yeast cells. Whichsection of the graph shows the MOST rapid

34. The structure labelled I allows for the rate ofgrowth?passage of~ blood vessels No. of(B) peripheral nerves cells(C) spinal cord (10000)(D) synovialfluid @


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7Items 38 -39referto the following information.Thetablebelowgivestheglucose


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8Items 41 - 42 refer to the following diagramsshowing events that occur in the ovary dur-ing the menstrual cycle.

(A) (B)

(C) (D)

In answering items 41 - 42, match each itemwith one ofthe options above. Each optionmay be used once, more than once or not atall.

41. Ovulation L-Development of corpus luteum ~2.

Items 43 -44 refer to the following diagramwhich shows part of a flower enclosed in acloth bag, as part of an investigation beingcarried out on reproduction in plants.

Cloth bag

43. The cloth bag would NOT prevent(A) wind pollination(8) cross fertilization%selffertilization(0) insectpollination

Tobeeffective in controlling how the gametesmeet, the bag should be put in place(A)(8)(C)(0)

afterpollinationbutbeforefertilizatioobefore pollination and fertilizationafter fertilization and pollinationbefore pollination but afterfert ilization

45. In a particular plant, red and white flower-colour show co-dominance. If twoheterozygous (pink) flowers are crossed, theexpected phenotypic ratio of the offspring is(A) allpink(8) I red: I white(C) 3 red: I white< m ) I red:2pink: I white


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Whic h of the following is an ex am ple ofcont in uou s variat io n i n human s?(A ) Sex /gender(B) To ng uerolling(C) BloodgroupsL D ) "" A du lt he ights

4 7 _ Natu ral selection differs from a rtificialselec tion be cau se

A bryophy ll um l ea f, i so la ted f rom th e pa rentplant, w il l g en e ra te n ew p l ants a s s e en b elow,

Leaf detachedfrom paren t plant

51.

5 2 _

l


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53. Which of the following would NOT contributeto hypertension (high blood pressure)?(A) High salt intake(H) Old age. < : ; ; f Regular exercise(D) Saturated tats in the diet

54.

~(B)

55.

I ( 'A(B)(C)(0)

Immunization isMOST effective incontrollingthe spread of a communicable disease if

(C)

a vaccine is administered to anuninfected individual

serum isadministeredtoan uninfectedindividual

a vaccine isadm inistered to an infectedindividual

serum is administered to an infectedindividual

(0)

Which of the following are directconsequences of disease in man?

I. Loss of man hours and productivityII. LossofhumanlifeIII. Lossof'livesrock and crops

rand II onlyIand III onlyII and III onlyI, II and III

56. The graph below represents the antibody levelof two individuals, X and Y, who are infectedat the same time with the same pathogen.a : : t t " , j /Xuntts ( :1/'t Time/dayso Key 0 - Time of infection

The graph indicates that(A) neither X nor Y will ever be sick

againX has been vaccinated against thisdisease but not Y

Y has fewer wh ite blood cells than XY previously had the disease but notX

(C)(0)

57. Theterrn 'habitat' refers to(A )@b an area where several organisms livethe area inwhich a particular organismlives

the biological characteristics of an areathe physical characteristic of an area(C)(0)


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11Item 58 refers to the diagram below showing four soil samples.

Mi xture ofhumus, clayand sand

Mixture of sand - > - ' - " .- . . ' . ' : . . . rhumus ~:-:- .... "': :.... ..,.~.

. . .. ." . < -_ ', :...;.

58. In which soil sample will a crop of'lettuce grow BEST?(A ) I

~ I t(C) III(0) IV

Mix tu re o fhumus and clay

Roc k

. ~ .~ . t~ ~ :: .. -J)::;:=f="-Earth wormsr .7.':':'"r :'_...' ~~- $

59. Which ofthe following are reasons to returnglass bottles?I.II. Glass isa non-renewable resource.Recycling glass lowers production

cost.Raw materials are renewableII.

resources.IV. T he en erg y used in bo ttle making is

no n-polluting,(A ) I and II o nl y(8) I and IV only(0)" II and I1Ionly(D) III and IVonly

60. Which of the following is NOT an airpollutant?(A)

e(C)(D)Carbon dioxideLeadS ul ph ur dioxideNitrogen

biology mutiple choice 2006

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