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O Level Biology November 2012 5090/11

UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS

General Certificate of Education Ordinary Level

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BIOLOGY 5090/11
Paper 1 Multiple Choice
5090/11
October/November 2012
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. 

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.


1

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.

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2

Which processes are responsible for the uptake of ions from the soil by a plant and the uptake of  glucose into the villi of a human?

3

The diagram shows some cells in the root of a plant that is absorbing water from the soil.

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How does the water potential of the cell marked 2 differ from the water potentials of the cells  marked 1 and 3?

4

According to the lock and key hypothesis, which is the lock and which is the key for the enzyme  lipase?

5

The graph shows the rate of photosynthesis in a plant in full sunlight at two different temperatures  and different concentrations of carbon dioxide.

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At normal atmospheric carbon dioxide concentrations, what limits the rate of photosynthesis?

6

Four test-tubes are set up as shown.

In which test-tube will the concentration of oxygen decrease most rapidly?

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7

The elements, listed, are found in all living organisms.

Which one is not obtained by plants from the soil? 

8

A person tries eating a diet consisting only of lettuce leaves and water.

Which condition might develop?

9

The table shows changes in the concentrations of blood components as the blood flows through  an organ.

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Which organ has the blood passed through?

10

Which bar chart represents the amount of starch digested in the mouth, stomach and ileum of a  human?

11

The diagram shows a tree trunk, with a ring of bark, which includes the phloem, removed.

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The tree will eventually die because this action cuts off the supply of

12

The diagrams show a plant in a flask of water. It is left in the light at 16°C for six hours.

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What explains the change in mass after six hours?

13

In the human circulatory system, what causes the transfer of materials from the capillaries to the  tissue fluid?

14

The diagram shows the blood pressure of a person at rest as the blood leaves the heart and  passes through arteries and then capillaries.

Which line shows the pressure of blood as it flows through veins before returning to the heart?

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15

The graph shows changes in the blood pressure in the left ventricle of the heart.

During which period is the left atrium contracting?

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16

The table shows the percentage composition of four samples of air.

Which sample has been breathed out by a person?

17

Which process does not result in an overall loss of energy from the organism?

18

The diagram illustrates changes in air pressure taking place inside the lungs during a complete  cycle of breathing.

Which position on the graph corresponds to the point at which the ribs are beginning to be  lowered?

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19

The diagrams show an athlete throwing a javelin.

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Which row describes the change in position of the right arm, and the action of the muscles  involved, between stages 2 and 3?

20

The diagram represents the blood supply to the liver and to the kidneys.

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Which vessels contain blood with the highest and lowest concentrations of urea?

21

Which changes will occur when a person walks from a very cold room into a hot room?

22

What happens in the eye when a person walks from a dark room into sunlight?

23

The diagram shows a section of the brain.

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What could be a result of damage to the part labelled X?

24

A person with diabetes mellitus is receiving treatment with insulin injections.

The graph shows how this person’s blood glucose concentration changed during part of one day.

At what point was an insulin injection given?

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25

Which component of tobacco smoke may cause lung cancer?

26

The diagram shows some of the stages in cheese production.

At which stage in the production of cheese are the bacteria added?

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27

The diagram shows a fermenter used for the production of antibiotics.

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Where do air and nutrients enter, and where do antibiotics and waste leave?

28
The diagram shows part of a food web.
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What is the original source of energy for this food web?
29

The table shows the mean dry biomass for the organisms in a food chain.

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Which pyramid of biomass is correct for this food chain?

30

The diagram shows part of the carbon cycle.

Which process causes the largest amount of carbon to be converted from one form to another?

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31

Which area of the diagram best describes mosquitoes?

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32

The presence of high concentrations of nitrogen-containing fertilisers in a pond can lead to the  death of fish.

What is the sequence of events leading to the death of the fish?

33

The diagram represents gametes P and Q fusing to give cell R. Cell R then produces gametes S,  T, U and V.

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Which statement about the numbers of chromosomes in the cells and gametes is correct?

34

Six bean seeds were soaked in cold water. Three of them were boiled and cooled. The boiled and the non-boiled seeds were chopped up and then placed on the surface of agar jelly containing starch.

After two days, all the seeds were removed and the jelly was tested with iodine solution.

The diagram shows the result of the experiment.

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What is the explanation for the results with the non-boiled bean seeds?

35

Which row describes the exchange of substances at the placenta?

36

How do condoms reduce the risk of HIV infection?

37

Which method could not be used to produce human insulin from genetically engineered bacteria?

38

One gene has two codominant alleles, AE and AF, and one recessive allele, AG.

How many different genotypes and phenotypes are possible?

39

Some normal fruit flies are subjected to radiation in a laboratory. As a result, they produce offspring with unusual characteristics, such as white eyes.

What causes this?

40

What would be the genotype(s) of the offspring from a cross between two organisms with the genotype Tt?

___

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 2012

5090/11/O/N/12


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