S.3 BIOLOGY

8/8/2019 S.3 BIOLOGY

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MT. ZION CHRISTIAN COLLEGE

END OF TERM TWO EXAMINATIONS 2010

BIOLOGY TIME: 2HOURS 30MIN

SENIOR THREE

Instruction to candidates

1. Answer all questions in section A and B plus any twoquestions in section C.

2. Answers for section A must be written in the Boxes3. Write answers for section B in the spaces provided4. Write answers for section C on the papers provided

SECTION A

1 The blood vessel in man with capillaries at both ends is the:A Pulmonary arteryB Hepatic portal veinC Hepatic arteryD Hepatic vein

2 The following organs and blood vessels form a possible passage

for an amino acidFrom the gut the lung cells; Pick the most correct sequence.

1 Villus 2 Liver 3 Lung cells 4 pulmonary artery5 Heart 6 Hepatic portal vein

A 1, 2,4,3,5 and 6B 2, 6,5,4,2, and 1C 1, 6,2,5,4, and 3D 5, 4,6,2,1 and 3

3 The blood constituents involved in the prevention of loss of blood, when the skin is

Injured are;A Platelets, globin and calciumB Prothrombin, fibrin and plateletsC Fibrin , glycogen and prothrombinD Fibrinogen, haemoglobin and calcium


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4 When blood is passing from the kidneys , it passes through

A Renal artery bicuspid valveaorta

B Pulmonary arterybicuspid valve aorta

C pulmonary arterytricuspid valve aorta

5 In which one of the following constituents of mammalian blood is

haemoglobinFound?A PlateletsB SerumC ErythrocytesD Fibrinogen

6 Which one of the following blood vessels contains highlyoxygenated blood?

A Hepatic portal vein

B Pulmonary veinC Pulmonary arteryD superior vena cava

7 Red blood cells are disc shaped so as toA capture oxygen more easilyB increase their surface area to volume ratio for gaseousexchangeC fight bacteria more easily

D increase their surface for efficient absorption of oxygen

8 Which of the following is a function of the lymphatic system?Pulmonary

1. Carries glycerol and fatty acids from the intestines2. Filters white blood cells which are file with bacteria from the

circulatory system3. Removes body tissues fluids from the tissues

4. Carries some digested food to the blood systemA 1, 2, and 4B 1, 2 and 3C 2, 3 and 4D 1, 3 and 4

9. Which of the following is not true about lymph?A. It is a colorless liquid that surrounds the body cellskeeping them moist


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B. It is made of plasma and white blood cells which pasthrough the thin walls of bloodCapillaries

C Lymph vessels have valves like veins but are thinner andtransparentD The movement of lymph is aided by the heart which sucksin lymph as it pumps

10 In a mammal, the blood vessels connected to the left auricleis the

A. Aortic archB. Pulmonary arteryC. Pulmonary veinD. Superior vena cava

11 Soldiers stood for a long time in a parade. After sometime,

they started fallingone after another.A. The air at the altitude was less denseB. Their leg muscles were momentarily paralyzedC. There was an accumulation of lactic acid in their musclesD. There was less supply of food to their brain

12 When a foreign protein or organ enters the human bodydefense force may react by

Producing antibodies. The specific white cells which produceantibodies are?

A. LymphocytesB. PhagocytesC. LeucocytesD. Polymorph

13 The raw material of anaerobic respiration isA. OxygenB. Carbon dioxideC. Ethyl AlcoholD. Glucose

14 Which of the following is used for gaseous exchange by a

newly hatched tadpole?


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A. Internal gillsB. External gillsC. LungsD. Buccal cavity

15 In plants, anaerobic respiration is less efficient than aerobicrespiration because?

A. Not all the carbohydrates are broken downB. The amount of water released is less in aerobic respirationC. The amount of carbohydrates released is than in aerobic

respirationD. There is energy released per amount of carbohydrate

broken down

16 During expiration in man, the diaphragm:

A. Flattens and intercostals muscles contractB. Flattens and intercostals muscles relaxC. Becomes doom shaped and intercostals muscles relaxD. Becomes dome shaped and intercostals muscles contract

17 A J-tube was used to find out the percentage composition ofcarbon dioxide

and oxygen in a given sample of air. The following resultswere obtained;

Column of air trapped in the J-tube =15.0cm.The column of air after mixing with potassium hydrogen=14 cm

The column of air after mixing with potassiumpyrogallate=12 cm

From these results, which one of the following columns in thetable is the most

correct percentage of oxygen and carbon dioxide in thesample of air?

Oxygen

Carbondioxide

A 20 0.03

B 16 0.04C 12 4.0D 16 4.0


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Photosynthesis and respiration are going on at thesame time

A. Carbon dioxide produced in respiration is used inphotosynthesis

B. In light respiration takes place at a slower rate and thuslittle carbon is givenout

C. Plants respire only when they are in darknessC. Respiratory enzymes are activated by darkness

23 Which of the following statement is correct in the stems of

the green plants?A. Water and mineral salts rise to the leaves in the phloem

while the products ofPhotosynthesis passes from the leaves in the xylem

B.Water, mineral salts and products of photosynthesis

both rise in the phloemC.Water and mineral salts move downwards in the xylem

to the rootsD. Water and mineral salts rise up the plant stem in the

xylem, while theproducts of photosynthesis pass from the leaves to the

roots via the phloem

24. on hot days, the leaves of the plants sometimes wilt.

Which of the following is theCorrect sequence of events leading up to the wiltingbecoming visible?

A. Water evaporates from the leafLeaf cell loses

waterPressure in the leavesfallcell contractleafloses shape.

B Water evaporates from leafcells lose watercell

contractpressure in the leaf Fall leafloses shape

C Water evaporates from leaf

cell contract

cells losewater pressure in the leaf Fall leafloses shape

D Water evaporates from leaf pressure in the leaf fall

cell contract

cells loses water leaf loses shape


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25. Which one the following is the most responsible for the rise ofwater up a tall tree?

A Root pressureB. Tugor pressureC. Transpiration pullD. Osmotic potential

26. Aplant cell is said to be flaccid when

A. It contains high concentration of starchB. The cell membrane is separated from the cell wallC. Sufficient water has entered the cell so that the cell

membrane exerts a pressure on the cell wallD. The cell contains sufficient cell vacuoles for its size

27. Choose the most correct description of sieve tubes in plants?A. Dead cells that transport water in plantsB. Living cells that transport water in plants

C. Dead cells that transport water in food from leaves toother plant parts

D. Living cells that transport water in food with in plant

28. A potato cylinder was measured and placed in the Petri dish.The greatest increase

In length of the cylinder would take place if the dish was;A. Left emptyB. Filled with water

C. Filled with dilute sugar solutionD. Filled with 5% salt solution29. Photosynthesis takes place mainly in the palisade cells

because;(1)They absorb most of the sunlight(2) They contain most of the chrolophyll(3)They are elongated at an angle to the epidermis so theyabsorb most of the sunlight(4)They are not spongy

Which of the following is not correct ?

A. 1 and 2B. 2 and 3C. 3 and 1D. 4 only

30 During photosynthesis, light provides the energy to combinecarbon dioxide and


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Hydrogen split from water to make carbohydrates. Which of thefollowing is the best statements in describing

the use of light in photosynthesis?A. Light energy is used to combine carbon dioxide and

waterB. Light provides the energy bonds which binds Carbon,

hydrogen, and oxygen to form carbohydratesC. During photosynthesis, LIGHT is used to split waterD. During photosynthesis, some energy is lost as heat

energy.


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SECTION B

31. The table below shows the stages of testing a green leaf forstarch

Stage Effects on the leaf

Put the leaf inboiling water

Put the leaf inhot ethanol(alcohol)

Wash leaf in hotwater

Add iodinesolution to leaf

(a) Complete the table by giving the effect that each stage has onthe leaf

(b) State two reasons why, when green leaves are placed indarkness for 24 hours, any

Starch that is present in them disappears.

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(c) Why are green leaves?(i) Tested for starch?-------------------------------------------------------------------------------------------------------------------

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-------------------------------------------------------------------------------------------------------------------(ii) De-starched before experiments to verify conditions forphotosynthesis are set?

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-------------------------------------------------------------------------------------------------------------------32. Study the figures A and B and answer questions that follow

Fig A

5

6

4

1

2

3


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Fig B

(i) What does A and B represent?

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(ii)Name the part labeled 1 to 6

1. ---------------------------------------------------------------------------------------------------------------

2. ---------------------------------------------------------------------------------------------------------------

3. ---------------------------------------------------------------------------------------------------------------

4. ---------------------------------------------------------------------------------------------------------------

5. ---------------------------------------------------------------------------------------------------------------

6. ---------------------------------------------------------------------------------------------------------------

(iii) Part 6 contain a green pigment called

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(iv) The part which controls the activity of the cell ispart--------------------------------------


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(v) Part 5 contains a liquid made up of water and dissolvedsolutes.

The liquid is called-------------------------------------------------------------------------------------------------------------------

(vi) Parts 2, 3, 4, and 6 are made of living materialscalled------------------------------------------

(vii) A has 3 parts which are absent from B.Name the 3 parts

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(viii) Name the part in A which can be described as freelypermeable

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(ix) How are bacteria cells different from A and B?-------------------------------------------------------------------------------------------------------------------

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(b) State the plural of the following words

I. Singular------------------------------------------------------------------------------------------

II. Species-------------------------------------------------------------------------------------------

III. Genus--------------------------------------------------------------------------------------------

IV. Order--------------------------------------------------------------------------------------------

V. Family-------------------------------------------------------------------------------------------

VI. Phylum------------------------------------------------------------------------------------------

(c) Give an example of the following;

Cell-----------------------------------------------------------------------------------------------------------------

Tissue--------------------------------------------------------------------------------------------------------------

Organ---------------------------------------------------------------------------------------------------------------

System-------------------------------------------------------------------------------------------------------------

Organ---------------------------------------------------------------------------------------------------------------


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(d) Giving reasons, classify a housefly according to the fo0llowing;Kingdom, phylum, class, order

Classification group

Reason

Kingdom

phylum

class

Order


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(b) What is this experiment intended to measure?

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-------------------------------------------------------------------------------------------------------------------(c) Name four factors that may influence the results of theexperiment

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SECTION C

Answer any TWO Questions in this section

34.(a) what is meant by the term metamorphosis?(b) Describe the life cycle of a cockroach.(c) State the economic importance of the cockroach


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35(a) what is respiration?(b) State the differences between aerobic and anaerobic

respiration(c) Describe the gaseous exchange in the frog.

36(a) what is soil erosion?(b)State the various types of soil erosion(c) Explain how mans activities may lead to soil erosion.

37(a) Describe the digestion of proteins in the human alimentarycanal

(b) what may happen to the products of digestion of protein?

S.3 BIOLOGY

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