aqa past paper

Topics: Bacteria, Larus, Gull Pages: 20 (2131 words) Published: November 2, 2014
Centre Number

For Examiner’s Use

Candidate Number

Surname
Other Names

Examiner’s Initials

Candidate Signature
Question

General Certificate of Secondary Education
Higher Tier
June 2012

Additional Science

BL2HP

H

Unit Biology B2

Biology
Unit Biology B2
Monday 21 May 2012

Mark

1
2
3
4
5
6
7
TOTAL

9.00 am to 10.00 am

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(b) 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.

(JUn12BL2Hp01)

G/K83213

6/6/6/6

BL2HP

2

Do not write
outside the
box

Answer all questions in the spaces provided.

1

Glycogen is stored in the muscles.
Scientists investigated changes in the amount of glycogen stored in the muscles of two 20 year-old male athletes, A and B.
Athlete A ate a high-carbohydrate diet. Athlete B ate a low-carbohydrate diet. Each athlete did one 2-hour training session each day.
The graph shows the results for the first 3 days.

Key:
120
100
Concentration of
80
glycogen in muscles
in mmol per kilogram 60
40
of muscle mass
20
0

1 (a) (i)

Training session
Athlete A

Athlete B
0

12

24

36
48
Time in hours

60

72

Give three variables that the scientists controlled in this investigation. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (3 marks)

(02)

G/K83213/Jun12/BL2HP

3

Do not write
outside the
box

1 (a) (ii) Suggest two variables that would be difficult to control in this investigation. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (2 marks)

1 (a) (iii) Describe one way in which the results of Athlete B were different from the results of Athlete A.
...............................................................................................................................................
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