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DHARUMAVANTHA SCHOOL EXAMINATIONS

First Term 2009

Grade 10

BIOLOGY

Paper 1 Multiple Choice

Additional Materials: Multiple Choice Answer SheetSoft clean eraser

Soft pencil (type B or HB is recommended)

READ THESE INSTRUCTIONS FIRST

Write in soft pencilWrite your name, class, index number and register number on the answer sheet in thespaces provided. unless this has already been done for you.

There are forty questions in this paper. Answerall questions. For each question, thereare four possible answers, A, B, C, and D.

Choose the one you consider correct and record your choice in the soft pencil on theseparate Answer sheet.

Read the instructions on the answer sheet very carefully.

Each correct answer will score one mark. A mark will not be deducted for wronganswer.

Any rough working should be done in this booklet.

StudentName

IndexNumber Class

RegisterNumber

5090/01

May 2009

1 hour

This question paper consists of 14 printed pages.

[Turn over

DHARUMAVANTHA SCHOOL

E x a m i n a t i o n s DSE 2009

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1. The diagram shows a typical plant cell after being placed in a concentrated salt solution forten minutes.

Which numbered structures are partially permeable?

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

2. In what way the process of osmosis differs from diffusion?

A It involves the movement of ions

B It involves the movement of molecules against the concentration gradient.

C It needs energy to take place.

D It involves the movement of water molecules through a semi permeablemembrane.

3. Some red blood cells were placed in distilled water and others were placed in three saltsolutions of different concentrations.

Which diagram shows the appearance of a cell has changed after being in the distilledwater for a short time?

4. What causes oxygen to diffuse into the blood from an alveolus (air sac) in the lungs?

A oxygen concentration in the alveolus is higher than in the atmosphere.

B The oxygen concentration in the alveolus is lower than in the blood.

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C The oxygen concentration in the atmosphere is higher than the carbon dioxideconcentration.

D The oxygen concentration in the blood is lower than in the alveolus.

5. In an experiment to investigate the effects of heat on germinating barley grains, three petridishes were set up as shown in diagram 1 and left for 3 days. A solution of iodine inpotassium iodide was then added to the starch-agar substrate. The results are shown indiagram 2, in which the shaded areas went blue / black, indicating the presence of starch.

Which is the best explanation of the results?

A Amylase is produced by barley grains that have been boiled.

B Amylase from barley grains is denatured when they are boiled.

C Germinating grains prevent iodine from staining starch blue / black.

D Starch from the substrate is used by the grains as an energy source.

6. The graph shows the effect of changing light intensity on the rate of photosynthesis in aplant at two different carbon dioxide concentrations.

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Which statement is correct?

A At low light intensities carbon dioxide is the limiting factor.

B At high light intensities carbon dioxide is the limiting factor.

C When carbon dioxide concentration is low, the plant cannot photosynthesize

D When the carbon dioxide concentration is high, there is no limiting factor.

7. The graph shows the concentration of carbon dioxide in the air surrounding a plantmeasured over 24 hours.

Which explains the carbon dioxide concentration at time X?

light intensity plant process

A

B

C

D

darkness

darkness

daylight

daylight

respiration

photosynthesis

respiration

photosynthesis

8. The diagram shows the shapes of the cells in a section of a leaf.

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Which cells could convert light energy to chemical energy?

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

9. The graph shows the effect of pH on the activity of a digestive enzyme.

In which part of the human alimentary canal would the enzyme work best?

A mouth B stomach C large intestine D small intestine

10. By which route does water travel through the leaf during transpiration?

A xylem mesophyll cells thin moisture film stomata

B xylem stomata thin moisture film meophyll cells

C stomata thin moisture film mesophyll cells xylem

D stomata xylem mesophyll cells thin moisture film

11. An experiment was set up to investigate the effect of an enzyme on coagulatedegg

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albumen.The results, after three hours, are shown in the diagram.

Where in the digestive system is the enzyme produced?

A liver B pancreas C salivary glands D stomach wall

12. The diagram shows a transverse section from the middle of a root of a dicotyledonousplant.

In which tissue are sugars and amino acids transported?

13. An athlete runs a 100 metre race.The following changes take place in the athletes body during the race.

1 increased availability of oxygen to muscles2 increased breathing rate3 increased production of carbon dioxide by muscles4 increased carbon dioxide concentration in the blood

In which order do these changes occur?

first last

A

B

C

1 2 3 4

4 2 3 1

3 4 2 1

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D

2 3 1 4

14. The apparatus shown is set up for an experiment to investigate respiration.

What will happen to the drop of fluid in the capillary tube over the next few hours?

A It will move away from the test-tube because of oxygen output by the seeds.

B It will move towards the test-tube because of carbon dioxide intake by the seeds.

C It will move towards the test-tube because of oxygen intake by the seeds.

D It will not move, because carbon dioxide intake and oxygen output are equal.15. What will be the effect of strenuous exercise on the amount of water lost through the skin

and the kidneys?

Amount of water lostthrough the skin

Amount of water lostthrough the kidneys

A

B

C

D

decreases

decreases

increases

increases

increases

decreases

increases

decreases

16. A student carried out an investigation to find the colour change obtained when fivedifferent concentrations of glucose solution were tested for reducing sugar.

The test tubes below show the results.

1 2 3 4 5

Which test tube result shows the absence and which one shows the highestconcentration of glucose.

glucose absent glucose highest

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A

B

C

D

green

red

green

blue

yellow

blue

red

red

17. The graph shows pressure changes in the left side of the heart, while at rest, during asingle heart beat.

What is the number of pulse in one minute, while the person is at rest?

A 70 B 100 C 60 D 120

18. The diagram shows a person doing pull ups on a horizontal bar.

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In moving from the lower position X to the upper positionY, which muscles and jointsmovements occur?

Biceps Triceps Hinge joint Ball and socket joint

A

B

C

D

contracts

relax

relaxes

contracts

relaxes

contract

contract

relaxes

rotates

flexes

extends

flexes

flexes

rotates

rotates

rotates

19. Which does not produce carbon dioxide?

A a muscle fibre B a sensory neuron C blood D saliva

20. Why does anaerobic respiration by yeast release less energy than aerobic respiration?

A Energy is lost in carbon dioxide.

B Energy is lost in oxygen.

C Energy remains trapped in ethanol.

D Energy remains trapped in lactic acid.

21. The diagram represents a kidney dialysis machine.

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What are the parts labelled X, Y and Z?

22. The diagram shows part of the human circulatory system.

In which vessel will the highest concentration of oxygen be found?

23. Adrenaline is secreted quickly when a person is frightened.

How does this affect the heart beat and the liver?

24. Diagram 1 shows the iris and pupil of a persons eye. Diagram 2 shows the same eye

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after a change in external conditions.

light radial irismuscles

circular irismuscles

A

B

C

D

decreases

decreases

increases

increases

relax

contract

relax

contract

contract

relax

contract

relax

25. The table shows the death rates from lung cancer amongst smokers and non-smokers.

What can be concluded from the data?

A People who get lung cancer are likely to be smokers of 26 or morecigarettes per day

B People who do not smoke will not get lung cancer.

C People who smoke have a higher chance of getting lung cancer.

D Smoking causes lung cancer.26. An experiment is set up as shown.

Flasks 1 and 2 contain lime water. Air is pumped through the flasks.

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What is the appearance of limewater in flasks 1 and 2 after a period of tenminutes?

27. A decrease in the numbers of producers in a food chain will cause

A the consumers to increase in numbers.

B more animals to migrate into the area.

C the total productivity to increase.

D the total biomass to decrease.

28. The diagram shows a food web from an ecosystem.

If the population of insects decreases, which other population will decrease themost?

Abadgers

Blizards

Csagebrush

Dsquirrels29. The diagram shows part of the carbon cycle.

Which numbered arrows represent respiration?

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

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30. Which graph shows the change in the amount of stored carbohydrate from thegermination of a seed until shortly before the start of photosynthesis?

31.The following samples are taken from a human patient.

Which sample will be examined to find out whether the patient is infected with themalarial parasite?

A red blood cells B saliva C urine D white blood cells

32. The diagram shows reproductive organs of a human male.Which tube carry only urine?

33. The diagram shows the female reproductive system.

In which parts are the eggs and the zygote formed?

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34. The diagram shows a section through a flower.

In which structures are haploid nuclei formed by reduction division?

A 1 and 4 B 2 and 3 C 1 and 3 D 2 and 435. Which method of contraception is the most effective in preventing the spread

of diseasessuch as syphilis and HIV/AIDS?

A cervical caps / diaphragms B male condoms

C oral contraceptive pills D spermicide36. What would be the result of cutting the sperm ducts on the right and left sides in a man?

A He would become sterile.

B He would be unable to develop sperms.

C He would be unable to pass urine.

D Male sex hormones would no longer circulate in the blood.37. The diagram shows part of the nitrogen cycle.

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Which stages involve bacteria?

A P, Q and T B P, R and S C Q, S and T D R, S and T

38. The diagram shows a food web.

Which of the organisms, shown in the food web, can survive by taking in only simpleinorganic materials?

A beetle B fungus C owl D tree

39. Which diagram shows part of the energy flow in an ecosystem?

40. In plant reproduction, the following processes occur.

1 fertilization 2 growth of a pollen tube 3 pollination 4 seedgermination

In which order do these processes take place?

A 1 4 2 3 B 2 1 3 4

C 3 2 1 4 D 4 3 1 2

GOOD LUCK

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