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O Level Biology June 2013 5090/11

UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS

General Certificate of Education Ordinary Level

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BIOLOGY
Paper 1 Multiple Choice
5090/11
May/June 2013
1 hour


Additional Materials:

Multiple Choice Answer Sheet
Soft clean eraser
Soft pencil (type B or HB is recommended) 


READ THESE INSTRUCTIONS FIRST


Write in soft pencil.
Do not use staples, paper clips, highlighters, glue or correction fluid.
Write your name, Centre number and candidate number on the Answer Sheet in the spaces provided  unless this has been done for you.
DO NOT WRITE IN ANY BARCODES.

There are forty questions on this paper. Answer all questions. For each question there are four possible  answers A, B, C and D.
Choose the one you consider correct and record your choice in soft pencil on the separate 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 a wrong answer.
Any rough working should be done in this booklet.
Electronic calculators may be used. 


1

Which structures are present in a root hair cell?


key
✓= present
✗= absent

2

What is an example of active transport?

3

An experiment measured the rate at which plants take up magnesium ions from solution. One  plant was given a poison that stops respiration. Another plant was left as normal. The graph shows the results.

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How are the magnesium ions being absorbed by the plants at points N and P?

4

The diagram represents how an enzyme molecule changes in shape.

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What explains this change?

5

The diagram represents a cross section of a leaf under the microscope.

Where is light energy converted into chemical energy?

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6

What is the effect of a lack of nitrate ions on plant leaves?

7

A green leaf is picked at time 07.00 and immediately placed in a sealed test-tube containing  hydrogen carbonate indicator solution. The tube is kept near a window for 24 hours. The table shows how the indicator changes in colour.

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Which colour will the hydrogen carbonate indicator be at times 12.00 and 24.00?

8

Which table states the tests for different food groups?

9

What are the basic units from which molecules of glycogen and of protein are synthesised?

10

The table shows where different components of food are digested in the alimentary canal.

Which option states where protein is digested?


key
✓= substance is digested
✗= substance is not digested

11

What contributes to the wilting of plant leaves?

12

In an experiment to investigate the transport of water, the roots of a plant are placed in water  coloured with a dye.

The diagrams show sections of the leaf, stem and root.

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Which numbered parts will become stained by the dye as the water is initially absorbed?

13

After muscular exercise, which blood vessel carries the lowest concentration of carbon dioxide?

14

The diagram shows the pressures in the left side of the heart during one heart beat.

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Which valves are open and which are closed at the time marked X?

15

Two hours after eating a meal, which vessel contains blood with the highest concentration of  glucose?

16

Which equation for anaerobic respiration in yeast is correct?

17

What happens to the diaphragm muscles and to the internal and external intercostal muscles  when a person breathes out during exercise?

18

The graph shows changes in the amount of air in a person’s lungs over a period of 30 seconds.

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Between which time periods is the rate of breathing fastest?

19

In the human breathing system, which features maintain the carbon dioxide gradient between the  alveoli and the outside air?

    1    blood continually pumped to the alveoli

    2    breathing in and out

    3    moist alveolar surfaces

    4    thin alveolar walls

20

Which of these correct statements describes control by negative feedback?

21

The graph shows changes in blood glucose concentration when a body responds to an external  stimulus.

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What is the hormone responsible for the change in blood glucose concentration in the first 30  minutes?

22

The graph shows the changes in the size of the pupil of the eye as the light intensity of the  surroundings is changed.

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Between which times is the light intensity increasing?

23

Which information about the listed glands is correct?

24

The diagram shows a section through the lower arm of a human.

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What are bones X and Y?

25

What are the effects of the excessive consumption of alcohol?


key
✓= effect occurs
✗= effect does not occur

26

During the production of yoghurt and cheese, the pH of the mixture changes.

What causes this change in pH?

27

During the production of alcohol, why must air be kept out of the fermenter?

28

The diagram shows energy flow in a food web.

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Which number represents an organism that eats both plants and animals?

29

A tree has insect larvae burrowing in its leaves. The emerging insects are eaten by birds and the  birds have parasitic fleas living amongst their feathers.

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Which is a pyramid of biomass and which is a pyramid of numbers for this food chain?

30

The diagram shows part of the nitrogen cycle.

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Which stages depend on bacteria?

31

Which factor does not help to make the mosquito an effective vector of malaria?

32

Cutting down tropical rain forest trees has many consequences.

Which of these consequences could lead to global warming?

33

The graph shows changes in the dry mass of a seed as it germinates.

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What causes the change shown between points S and T?

34

The diagram shows part of a flower after it has been pollinated.

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Which labelled structures are diploid and which are haploid?

35

Where does the placenta allow the exchange of materials to take place between mother and  fetus?

36

The diagram shows some stages in cell division in a fruit fly.

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Cell X contains 8 chromosomes.

How many chromosomes are in cell Y and in cell Z?

37

The genotype for the height of an organism is written as Tt.

What conclusion may be drawn?

38

In a large family, half the children were blood group A and half were blood group B.

If the father was blood group O, what was the mother’s blood group?

39

How many chromosomes are there in a zygote which develops into a baby with Down’s  syndrome? 

40

Which statement describes an example of artificial selection?

___

Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every  reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity.

University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of  Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.

© UCLES 2013

5090/11/M/J/13


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