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DHARUMAVANTHA SCHOOL EXAMINATIONS

Preliminary Ordinary Level 2009

BIOLOGY

Paper 1 Multiple Choice

Additional Materials: Multiple Choice Answer SheetSoft clean eraser

Soft pencil (type B or HB is recommended)

READ THESE INSTRUCTIONS FIRSTDo not open this booklet until you are told to do so.

Write your name, centre number and candidate number on the question paper and the answersheet in the spaces provided.

There are forty questions in this paper. Answerall questions. For each question, there are fourpossible answers, A, B, C, and D. Choose the one you consider correct and record your choice inthe soft pencil on the separate answer sheet.

Read very carefully the instructions on the answer sheet

Each correct answer will score one mark. A mark will not be deducted for wrong answer.Any rough work should be done in this booklet.

1. The diagram shows four different cells (not drawn to scale).

CANDIDATENAME

CENTRENUMBER

CANDIDATENUMBER

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August/September2009

1 hour

This question paper consists of 18 printed pages.

[Turn over

DHARUMAVANTHA SCHOOL

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

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Which cells provide a large surface area for absorption?

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

2. Why are all gaseous exchange surfaces moist?

A Concentration gradients occur only in liquids.

B Gases dissolve before diffusing across the surfaces.

C Gases move across the surfaces by osmosis.

D Molecules cannot diffuse in air.

3. Which shows the changes in appearance of a plant cell as it remains in a concentrated sugar

solution for thirty minutes?

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4. The graph shows the results of an investigation into enzyme activity.

How should the horizontal axis of the graph be labelled?

A pH B temperature C time D volume

5. The diagram shows some food moving along the alimentary canal

Which muscles behind the bolus contract or relax?

A Only longitudinal muscles contract

B. Both longitudinal and circular muscles relax

C. Circular muscles contract and longitudinal muscles relax

D. Only circular muscles relax

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6.The table shows some of the nutrients in four meals.

Which meal will be the most likely to stimulate peristalsis in the alimentary canal?

7. The diagram shows two plant cells, X and Y, drawn to different scales.

Samples of the contents of X and Y were tested.What results are expected?

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8. The diagram shows a cross-section through a leaf,

Which cell type absorbs the most carbon dioxide during the day?

9. How is the rate of transpiration affected by decreasing temperature and bydecreasing light

intensity?

10. The diagram shows two shoots at the start of an experiment on transpiration.

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What are the readings on the spring balances after three days?

11. In an experiment three glass bell jars were set up as shown in the diagram.

At the end of the experiment, which bell jar has the most oxygen and which has the

least?

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12. The graph shows the rate and depth of breathing in a person before exercise.

Which graph shows the rate and depth of breathing of the same personimmediately after a

period of exercise?

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13. An athlete runs a race. The graph shows how the concentration of lactic acid in hisleg muscles

changes.

For how long did the athlete run?A 2 minutes B 4 minutes C 6 minutes D 10 minutes

14. The plan shows the blood system of a mammal.

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What does the part labelled X represent?

A heart B kidneys C liver D lungs

15. The diagram shows a double circulatory system.

Which two vessels carry blood at the highest pressure?

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

16. The table shows the amount of water and salt lost from the kidneys and skin on ahot day and

on a cold day. Food and drink intake are the same on both days.

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What do these results show?

A Less water is lost from the kidneys on a cold day than on a hot day.

B More salt is lost from the kidneys on a hot day than on a cold day.

C The total amount of salt lost each day is the same.

D Water is not lost from the kidneys on hot days.

17. The diagram shows bones and muscles in the human arm.

Which row correctly identifies the biceps, triceps and ulna?

18. Eye helps us to focus on nearby and far away objects.

What is the action of muscles in his eyes when a person focus on a distant object?

A. Both radial and circular ciliary muscles relax.

B. Radial ciliary muscles contract and circular ciliary muscles relax.

C. Both radial and circular ciliary muscles contract.

D. Circular ciliary muscles contract and radial ciliary muscles relax.

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19. The diagram shows structures within human skin under two different externalconditions.

What are external conditions 1 and 2?

20. What is meant by negative feedback?

A A change away from a set point causes a change back towards the set point.

B A change away from a set point causes further change away from the set point.

C A change towards a set point causes a change away from a set point.

D Changes away from a set point are prevented.21. The diagram represents a central nervous system. X,Y, and Z show possible siteswhere the

system can be blocked by a local anaesthetic.

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Of four men, one had no anaesthetic block and the other three had only oneanaesthetic block

at X, Y or Z.

One of the men can feel a pinprick on his leg but cannot move it.

Where is the anaesthetic block?

A block is at X B block is at Y C block is at Z D no block

22. The diagram shows half a flower.

The following key may be used to identify the plant on which the flower is growing.

1 petals separate from sepals ................................ go to 2

petals and sepals joined ......................................... plant P

2 flower with four stamens ...................................... plant Q

flower with more than four stamens ........................ go to 3

3 ovary as tall as wide ............................................ plant R

ovary taller than wide .............................................. go to 4

4 flower has two petals ........................................... plant S

flower has more than two petals .............................. plant T

To which plant does the flower belong?

A plant P B plant Q C plant R D plant T

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23. What is not normally essential for germination?

A enzymes B light C oxygen D warmth

24. The diagrams show a camel before and after drinking a large volume of water.

Which statement is correct?

A Growth has occurred because the animal has increased in volume.

B Growth has occurred because the animal has increased in mass.

C Growth has not occurred because the animals height is unaltered.

D Growth has not occurred because the dry mass has not increased.

25. Meiosis is also called as reduction division.

What is the result of meiosis?

A. at the end of the division four identical daughter cells are produced.

B. The chromosomal number in the daughter cells is the same as parent cell.

C. Four non-identical daughter cells are produced.

D. At the end of the division two identical daughter cells are produced.26. The table shows the characteristics of four microbes.

Which one could be a virus?

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27. Fungi are decomposers.

Why are they important in the food web?

A They provide food for snakes.

B They control the numbers of toads.

C They provide energy for plant growth.

D They release minerals essential for plant growth.

28. A single tree is food for a large population of caterpillars. Small birds eat thecaterpillars. The small birds are eaten by a bird of prey.

Which is the pyramid of number?

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29. The diagram shows part of the carbon cycle.

Which process is missing from the diagram?

A combustion B photosynthesis C respiration D transpiration

30. The populations of four organisms in a lake were measured between 1908 and1990.

Which organism was affected by an outbreak of disease in 1984?

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31. The diagram shows a side view section through the male reproductive system.

Where are both hormones and new cells being produced?

32. What causes menstruation?

A act of sexual intercourse B less hormones secreted by the ovaries

C nerve impulses from the brain D release of an egg into the oviduct

33. A contraceptive pill contains the hormones progesterone and oestrogen.

How does this pill prevent conception?

A changing the length of the menstrual cycle B inhibiting menstruation

C preventing the release of eggs D stopping implantation of theembryo

34. The diagram shows a developing fetus.

Where does gaseous exchange between mother and fetus occur?

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35. The diagram shows changes in the thickness of the uterus lining of a woman.

What happens each time at X?

A fertilization B implantation C menstruation D ovulation

36. Which of the following are genetically identical?

A brothers and sisters in the same family B cuttings taken from the same plant

C gametes from the same parent D seeds produced by the same tree

37. The chart shows the inheritance of coat colour in mice. The allele for brown coat, B, is

dominant to the allele for white coat, b.

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What are the most likely genotypes of the individuals P and Q?

38. Which statement describes an example of artificial selection?

A It has been found that some strains of bacteria produce antibiotics.

B It is common practice to mate bulls with cows that produce the most milk.

C It is possible to control caterpillars on food crops by releasing small waspswhich lay their

eggs in caterpillars and kill them.

D Mosquitoes have developed strains that are resistant to insecticides.

39. The diagram shows the inheritance of coat colour in mice.

Which mouse is heterozygous for coat colour?

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40. The diagram shows the offspring of a cross between two wolves.

Brown colour is caused by a dominant allele B and white colour by a recessiveallele b.

What are the genotype and the phenotype of wolf W?

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GOOD LUCK