AQA GCSE BIOLOGY PAPER 1 HIGHER TIER [8461/1H] JUNE 2020

GCSE

BIOLOGY

8461/1

Higher Tier Paper 1H

Tuesday 12 JUNE 2020 Afternoon Time allowed: 1 hour 45 minutes

Materials

For this paper you must have:

 a ruler

 a scientific calculator.

Instructions

 Use black ink or black ball-point pen.

 Pencil should only be used for drawing.

 Fill in the boxes at the top of this page.

 Answer all questions in the spaces provided.

 If you need extra space for your answer(s), use the lined pages at

the end of this book. Write the question number against your

answer(s).

 Do all rough work in this book. Cross through any work you do

not want to be marked.

 In all calculations, show clearly how you work out your answer.

Information

 The maximum mark for this paper is 100.

 The marks for questions are shown in brackets.

 You are expected to use a calculator where appropriate.

 You are reminded of the need for good English and clear

presentation in your answers.

*jun20 4611H01*

IB/M/Jun20/E23 8461/1H

For Examiner’s Use

Questio

n

Mark

1

2

3

4

5

6

7

TOTAL

 1 / 4

2

Do not write

outside the

*02

*

IB/M/

Jun20/8461/1H

0 1

0 1 1

0 1 2

Answer all questions in the spaces

provided.

box

This question is about photosynthesis.

. Complete the word equation for

photosynthesis. [2 marks]

 + → + oxygen

. Describe how energy for the photosynthesis reaction is gained

by plants. [2 marks]

Students investigated the effect of temperature on the rate of photosynthesis.

The students shone light from a lamp onto pondweed and measured the

volume of oxygen produced per hour.

Table 1 shows the results.

Table 1

Temperature

in °C

Rate of photosynthesis in cm3

/hour

Test 1 Test 2 Test 3 Mean

20 18.

5

19.3 19.

5

X

25 32.

6

34.1 32.

9

33.2

30 41.

9

45.2 44.

9

44.0

35 38.

6

39.8 44.

0

40.8

40 23.

1

20.5 22.

4

22.0

 2 / 4

3

Do not write

outside the

*02

*

IB/M/

Jun20/8461/1H

45 1.9 14.2 2.2 2.1

 3 / 4

Do not write

outside the

4

IB/M/

Jun20/8461/1H

*03

*

0 1 3

0 1 4

0 1 5

0 1 6

0 1 7

. Calculate mean value

X.

[2 marks]

box

X = cm3

/hour

The students identified one anomalous result in Table 1.

. Draw a ring around the anomalous result in

Table 1.

[1 mark]

. Suggest one possible cause of the anomalous

result. [1 mark]

. How did the students deal with the anomalous

result? [1 mark]

. Give one factor the students should have kept constant in this

investigation. [1 mark]

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