GCSE OCR 21st Century Science B7 Specimen Paper + Mark Scheme (Higher)

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  • Created on: 17-06-13 20:32
Preview of GCSE OCR 21st Century Science B7 Specimen Paper + Mark Scheme (Higher)

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SPECIMEN H
GENERAL CERTIFICATE OF SECONDARY EDUCATION
TWENTY FIRST CENTURY SCIENCE A163/02
BIOLOGY A
Unit 3: Module B7 (Higher Tier)
Candidates answer on the question paper
A calculator may be used for this paper.
OCR Supplied Materials:
None Duration: 1 hour
Other Materials Required:
Pencil
Ruler (cm/mm)
Candidate Candidate
Forename Surname
Centre Number Candidate Number
INSTRUCTIONS TO CANDIDATES
For Examiner's Use
Write your name clearly in capital letters, your Centre Number and
Candidate Number in the boxes above.
Max Mark
Use black ink. Pencil may be used for graphs and diagrams only.
Read each question carefully and make sure that you know what you 1 6
have to do before starting your answer. 2 12
Answer all the questions.
Write your answer to each question in the space provided, however 3 5
additional paper may be used if necessary. 4 11
INFORMATION FOR CANDIDATES 5 9
Your quality of written communication is assessed in questions marked 6 3
with a pencil (). 7 7
The number of marks for each question is given in brackets [ ] at the end
of the question or part question. 8 7
The total number of marks for this paper is 60. TOTAL 60
This document consists of 16 pages. Any blank pages are indicated.
© OCR 2011 [QRN/.../...] OCR is an exempt Charity
DRAFT V9 Turn over

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Page 2

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Answer all the questions.
1 The bones of the human skeleton are held together at joints, which allow movement.
The diagram shows the knee joint of the human skeleton.
Explain how the parts of the knee joint enable it to function.
The quality of written communication will be assessed in your answer to this question.
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Page 3

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This question is about the heart and heart disease.
(a) Look at the diagram of the heart.
(i) Complete the two labels on the diagram below.
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X
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[1]
(ii) Suggest what would happen if structure X was faulty and the problems that this could
cause.
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......................................................................................................................................... [2]
(iii) The thickness of the walls of the four chambers of the heart is different.
Explain why.
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Page 4

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Eating too much fatty food can increase the risk of heart disease.
Read the article about heart disease.
Heart disease is related to blood cholesterol levels
Doctors say that the number of cases of heart disease in the population is directly related to
the level of cholesterol in the blood.
People with high cholesterol are almost twice as likely to experience heart disease during
their lifetime.…read more

Page 5

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Our bodies maintain a constant body temperature of 37 °C.
(a) These steps explain one way in which the body controls its own temperature.
They are in the wrong order.…read more

Page 6

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When the human body is in danger of cooling down, it responds in order to maintain its core
temperature.
Draw a straight line from each structure to the action it takes to maintain core temperature.
Then draw a straight line from each correct action to the role it plays in maintaining core
temperature.…read more

Page 7

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Natural ecosystems can be unbalanced by human activity.
(a) A gardener notices that the pond in her garden has turned green and all of the fish have died.
She suspects that this may be because she used inorganic fertiliser in her garden.
Explain to the gardener how using inorganic fertiliser may have caused the effects in her
pond.
The quality of written communication will be assessed in your answer to this question.
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Page 8

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Energy can be generated in many ways.
Which of the following ways to generate electricity could meet the requirements of a closed
loop system?
Put ticks () in the boxes next to the correct answers.…read more

Page 9

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This question is about genetic modification.
(a) Explain how bacteria can be genetically modified to produce human insulin.
Suggest benefits of using human insulin rather than insulin extracted from animals.
The quality of written communication will be assessed in your answer to this question.
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Page 10

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Wheat can be genetically modified to be resistant to weed killer.
This helps farmers to keep their wheat crop free of weeds, maximise the yield and earn
more profit. It also helps consumers by providing a larger supply of food.
However, some people are opposed to the genetic modification of wheat in this way for a
variety of reasons. Some think it is morally wrong to alter the DNA of living things, as if
human beings are "playing God". Others have different concerns.…read more

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