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1 Examine the following cell.

Based on the internal structure, the cell is likely to ______.

A be a cheek epithelial cell

B be a mature red blood cell

C require high levels of oxygen

D produce high levels of sugars

2 What is the main disadvantage of a spherical cell doubling its diameter without

dividing?

A The amount of food diffusing into the cell is reduced.

B There is increased in volume for stored food.

C The effectiveness of diffusion is reduced.

D The nucleus loses control of half the cytoplasm.

3 The table below shows the rate at which two sugars are absorbed into the lining of the small intestine of a mammal. The rates are shown for a healthy intestine and for an intestine which has been poisoned by a substance which stops respiration in cells.

Rate of absorption (arbitrary units)

Type of sugar Healthy intestine Poisoned intestine

Arabinose 29 29

Glucose 100 33

From the data, how are the two sugars mainly absorbed into the intestinal lining?

Arabinose Glucose

A diffusion osmosis

B diffusion active transport

C osmosis active transport

D active transport osmosis

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4 The diagram below shows the coronary artery in a middle-aged person.

Which of the following chemicals accelerates the deposition of fatty substances

on the inner walls of arteries?

A Tar

B Alcohol

C Nicotine

D Carbon monoxide

5 Digestive juices were collected from different regions of the alimentary canal.

Drops of these juices were added to a glass plate coated with starch gel as shown below.

After 1 hour, the starch gel was rinsed with distilled water. Then iodine solution was added to it. Which of the following is the probable result of this experiment?

Spot with digestive juice

1 2 3

A Brown Blue Black Brown

B Blue Black Brown Blue Black

C Brown Blue Black Blue Black

D Blue Black Brown Brown

fatty deposits

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6 The diagram shows the structure of a villus in the small intestine. The arrows show the direction of flow of the fluids.

After a meal of fish and chips, where will you find the highest concentrations of

the products of digestion of proteins, oils and carbohydrates?

proteins oils carbohydrates

A K L N

B L N M

C N M N

D M N M

7 The diagram shows an enzyme action by lipase.

Stage 1 Stage 2 Stage 3

If ethanol emulsion test and biuret test are carried out at stage 3 of this enzyme action, what will be the correct observations for the food tests? Ethanol emulsion test Biuret test

A Clear Purple

B Clear Pale blue

C White emulsion Purple

D White emulsion Pale blue

lacteal

K

L N

M

lacteal

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Questions 8 and 9 refer to the diagram below.

8 When the root is in contact with water in the soil, which living cell in the diagram

has the lowest water potential?

A 1 C 2

B 3 D 4

9 What type of cell is label 1 pointing to?

A root hair cell

B lignin

C muscle cell

D xylem vessel

10 The diagram shows an experiment to

investigate the action of lipase on 1.0 g of fat. After 15 minutes at 20oC, half of the fat was digested away. How much fat would be left in the test tube if the experiment was repeated at 80oC?

A 1.0 g C 0.75 g

B 0.5 g D 0.0 g

11 In blood donation, why is blood collected from the vein instead of the artery?

A The vein has a bigger lumen for easy collection of blood.

B The vein has thinner walls for easier penetration of the needle.

C The vein contains deoxygenated blood to reduce the loss of oxygen from the donor.

D The lower blood pressure in the vein ensures a safe draining of blood from the donor.

lipase solution

1.0 g of fat

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12 The diagram below shows the transverse section of a mammalian heart.

Which valves will open and close during ventricular systole?

open close

A E and F F and H

B E and G F and G

C F and G E and F

D F and H E and G

13 A herbaceous plant, growing in a nutrient solution, was placed in a well-lit

chamber through which humid air was drawn in at a slow rate. The diagram shows a section through a part of the plant.

It was possible to measure the rate of movement of fluid in tissues P and Q. The

humid air was then replaced by dry air and it was observed that changes in the speed of movement of fluids in tissues P and Q occurred.

What were these changes?

tissue P tissue Q

A little change greatly increased upward movement

B little change greatly increased downward movement

C greatly increased downward movement little change

D greatly increased upward movement greatly increased downward movement

tissue P

tissue Q

E

F H

G

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14 The graph shows the pressure changes in the aorta and the left side of the heart during one cardiac cycle.

At which points do the bicuspid and aortic valves close respectively?

A W and Y C X and Y

B W and Z D X and Z

15 Which of the following graphs represents the changes in carbon dioxide

concentration in a fresh water pond at a garden?

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16 Which of the following is incorrect with reference to the reactions in the arrow diagram below?

A Reaction I is not found in animals

B Reaction II occurs mainly in the liver

C Reaction III occurs in the dark as well as in the light for all organisms

D Reaction IV occurs in the presence of oxygen

17 The results in the table below were obtained by analysis of the vacuolar sap of a

fresh water alga, Nitella clavata, and of the pond water in which it was growing.

Ion sap concentration / mg ions per dm3

pond water concentration/ mg ions per dm3

Ca2+ 26.0 2.6

Mg2+ 21.6 6.0

Na+ 49.9 1.2

K+ 49.3 0.51

Which of the following processes accounts for these results?

A diffusion B plasmolysis C osmosis D active transport 18 The graph shows temperature changes in a healthy person’s body.

At which time (A, B, C or D) would the person shiver?

glucose

Starch

glycogen Lactic acid

Carbon dioxide & water

I II

III

IV

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Rate of photosynthesis

Light intensity

X

Y

Z

Rate of photosynthesis

Rate of photosynthesis

Rate of photosynthesis

Light intensity

Light intensity

Z Y X

X Y Z

Z

Y

X

19 The graph below shows the energy level during the breakdown of hydrogen peroxide into water and oxygen, in the presence and absence of catalase enzyme.

What is the difference in activation energy of the reaction when the catalase enzyme is present and when it is absent?

20 The rate of photosynthesis of a plant always relates with the surrounding light

intensity. Three samples of phytoplankton were collected at different depths of sea: X at surface water, Y at medium water and Z at great depth. Which of the following graphs shows the CORRECT effects of light intensity on the rates of photosynthesis of the three plant species concerned?

A C

B D

Light intensity

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21 The graph shows the oxygen consumption and energy released during a period of exercise.

At which point in time is an oxygen debt incurred? 22 The diagram below shows the positions of various endocrine glands in the human

body.

Which of the glands marked 1,2,3,4 and 5 function together to enable a person to withstand stress? A 1 and 2 C 3 and 5 B 1 and 4 D 2 and 4

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23 The diagram shows vertical sections of kidneys of coypu, brown rat and kangaroo rat. Note the relative sizes of cortex and medulla.

Coypu are found in fresh water and are never short of water to drink. Brown rats are able to go some days without drinking. Kangaroo rats are able to live in deserts without drinking at all. Which kidney belongs to which animal?

1 2 3

A Brown rat Coypu Kangaroo rats

B Brown rat Kangaroo rats Coypu

C Kangaroo rats Brown rat Coypu

D Kangaroo rats Coypu Brown rat

Questions 24 and 25 refer to the information below. In a set-up, some living yeast cells were added to a 10% glucose solution under anaerobic conditions. The graph below shows the changes in the amount of 3 substances in the set-up.

24 Which curves represent the changes in the amounts of yeast and glucose

respectively?

Yeast Glucose

A 1 2

B 1 3

C 2 3

D 3 1

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25 What products are formed in the set-up?

A ethanol and lactic acid

B lactic acid and carbon dioxide

C ethanol and carbon dioxide

D ethanol, lactic acid and carbon dioxide

26 Blood transports

(I) heat around the body

(II) digested food substances around the body

(III) oxygen around the body

(IV) waste substances to excretory organs

A I, II and III C II, III and IV

B I, II and IV D I, II, III and IV

Question 27 refers to the graph below which shows the distribution of light-sensitive cells on the retina.

27 Which of the following combinations is correct?

X Q

A cones blind spot

B cones yellow spot

C rods blind spot

D rods yellow spot

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28 A woman notices a huge dog running towards her, and her heart starts to beat faster. Which of the following nervous pathways best represents the actions?

A sense organ sensory neurone spinal cord motor neurone muscles

B sense organ sensory neurone spinal cord motor neurone gland

hormone muscle

C sense organ sensory neurone brain motor neurone muscles

D sense organ sensory neurone spinal cord motor neurone gland

29 The diagram shows a human sperm cell.

What does structure P always contain? A an X chromosome

B a Y chromosome

C both an X and a Y chromosome

D either an X or a Y chromosome

30 An electrical impulse can be transmitted along three neurones as shown in the

following diagram.

The sensory neurone is represented by ________.

A W

B X

C Y

D Z

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31 The diagram below shows a developing human fetus.

The embryo is protected from shock by a substance located at ____. A 1

B 2

C 3

D 4

32 The diagram below shows a front view of the eye. Note the position of the

muscles controlling the pupil size.

Which one of the following sets of activities takes place when a person walks from a dark room into bright light?

Radial muscles circular muscles pupil diameter

A relax contract increases

B contract relax decreases

C relax contract decreases

D contract relax increases

1

2

3 4

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33 Refer to the diagram, which shows a procedure being carried out on cows.

Which cows are genetically identical?

A Cow 1 and Cow 4

B Cow 2 and Cow 4

C Cow 3 and Cow 4

D Cow 1 and Cow 3

34 One of the new technological developments for the treatment of insulin-

dependent diabetes is an electronic monitor that can be implanted in an affected person. The monitor gives a continuous readout of the level of glucose in the blood. An advantage of this technology is that a person with diabetes would know when it is necessary to

A have an insulin injection

B do a blood test

C have a glucagon injection

D reduce water intake

35 Which of the following pairs of comparison is WRONG?

Meiosis Mitosis

A Chromosomes duplicate twice Chromosome duplicate once

B Four haploid daughter cells are formed

Two diploid daughter cells are formed

C Pairing of homologous chromosomes occurs

No pairing of homologous chromosomes occurs

D It takes place in pollens and ovules

It takes place in tips of stems and roots

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36 The diagram below shows a typical food pyramid. Which statement about the pyramid is always true?

A Numbers in level D exceed those in level C.

B Energy flow is upwards from D to A.

C Level A is occupied by a producer.

D Cumulative poisons become concentrated as we move down from A to D.

37 The table below records how energy from food ingested is used by a typical male

buffalo.

Ingestion of food

Exhalation

Heat radiated from body

Growth and repair

Products of excretion and egestion

Energy/ arbitrary

units

100

26

8

4

62

What percentage of this energy is available to consumers and decomposers? A 100

B 96

C 66

D 4

38 It is important to conserve wild relatives of today’s crop plants so that _________ A the wild plant’s ecological niches can be used for crop growing in the

future. B alleles for disease resistance can be introduced into crops of the future.

C inferior alleles can be removed from crops and transferred to their wild

relatives.

D nitrogen-fixing bacteria are prevented from dominating the soil ecosystem.

A

B

C

D

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39 When a large amount of nitrogenous fertilizer leaches into a stream, which of the following graphs shows the likely changes in the populations of algae and bacteria along the stream?

40 A grasshopper eats only the blades of the grass Lolium perenne. The

grasshopper is eaten by a species of carnivorous beetle. Based on the description, we may define the grasshopper’s

A community and habitat.

B food web and trophic level.

C habitat and environment.

D niche and trophic level.