gcse biology june 2012 aqa paper

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Centre Number Candidate Number For Examiner's Use
Surname
Other Names
Examiner's Initials
Candidate Signature
Question Mark
General Certificate of Secondary Education 1
Higher Tier
June 2012 2
3
Science A BL1HP 4
H
Unit Biology B1
5
Biology 6
Unit Biology B1 7
8
Tuesday 12 June 2012 9.00 am to 10.00 am
TOTAL
For this paper you must have:
a ruler.
You may use a calculator.
Time allowed
1 hour
Instructions
Use black ink or black ball-point pen.
Fill in the boxes at the top of this page.
Answer all questions.
You must answer the questions in the spaces provided. Do not write
outside the box around each page or on blank pages.
Do all rough work in this book. Cross through any work you do not want
to be marked.
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 60.
You are expected to use a calculator where appropriate.
You are reminded of the need for good English and clear presentation in
your answers.
Question 3 should be answered in continuous prose. In this question you
will be marked on your ability to:
­ use good English
­ organise information clearly
­ use specialist vocabulary where appropriate.
Advice
In all calculations, show clearly how you work out your answer.
(JUn12BL1Hp01)
G/K83139 6/6/6/6 BL1HP

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Page 2

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Answer all questions in the spaces provided.
1 Scientists at a drug company developed a new pain-killing drug, drug X.
1 (a) Painkillers do not cure infectious diseases.
Why?
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(1 mark)
1 (b) The scientists compared drug X with two other pain-killing drugs, drug A and drug B.
In their investigation the scientists:
chose 600 volunteers.…read more

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1 (c) (i) How much pain did the volunteers still feel, four hours after taking drug A?
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(1 mark)
1 (c) (ii) Give one advantage of taking drug A and not drug B.
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(1 mark)
1 (c) (iii) Give two advantages of taking drug B and not drug A.
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(2 marks)
1 (d) Drug X is much more expensive than both drug A and drug B.…read more

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2 The diagram shows part of a carbon cycle in a habitat.
Atmosphere
Y
Fossil fuels
X
Algae
Microorganisms
Animals
2 (a) Name the processes shown by arrows X and Y.
X .....................................................................
Y .....................................................................
(2 marks)
2 (b) Describe the part played by algae in this carbon cycle.
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(3 marks)
2 (c) In tropical rainforests process X is much faster than in most other habitats.
Suggest why.
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3 In this question you will be assessed on using good English, organising information
clearly and using specialist terms where appropriate.
Plants and animals have become adapted in many different ways to reduce the risk of
being eaten by predators.
Describe these adaptations.
Give examples of animals and plants adapted in the ways you describe.
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4 Charles Darwin investigated tropisms in plants.
Some students did an investigation similar to Darwin's investigation.
The students:
grew seeds until short shoots had grown
used black plastic to cover parts of some of the shoots
put the shoots in light coming from one direction
put boxes over the shoots to keep out other light.
The diagrams show how the investigation was set up.…read more

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4 (b) Shoot A bent towards the light as it grew.
Explain how.
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(4 marks)
4 (c) What conclusions can be drawn from the results about:
4 (c) (i) the detection of the light stimulus
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(1 mark)
4 (c) (ii) where in the shoot the response to the light takes place.
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Page 8

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Do not write
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There are no questions printed on this page
DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
(08)
G/K83139/Jun12/BL1HP…read more

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5 People may be immunised against diseases using vaccines.
5 (a) (i) Which part of the vaccine stimulates the body's defence system?
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(2 marks)
5 (a) (ii) A person has been vaccinated against measles. The person comes in contact with the
measles pathogen. The person does not catch measles.
Explain why.
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5 (b) A man catches a disease. The man has not been immunised against this disease.
A doctor gives the man a course of antibiotics.
The graph shows how the number of live disease bacteria in the body changes when
the man is taking the antibiotics.…read more

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