Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
GCSE
BIOLOGY
Higher Tier Paper 1H
Monday 6 December 2021 Morning Time allowed: 1 hour
Materials
For this paper you must have: For Examiner’s Use
● a ruler
Question Mark
● a scientific calculator.
1
Instructions
2
● Use black ink or black ball-point pen.
● Fill in the boxes at the top of this page. 3
● Answer all questions in the spaces provided. 4
● Do all rough work in this book. Cross through any work you do not want to
be marked. 5
● In all calculations, show clearly how you work out your answer. TOTAL
Information
● The maximum mark for this paper is 52.
● 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.
DEC2184611H01 IB/M/Dec21/E11 8641/1H
, 2
Answer all questions in the spaces provided.
0 1 This question is about photosynthesis.
0 1 . 1 Complete the word equation for photosynthesis.
[2 marks]
_________________________________________ + _________________________________________ → _________________________________________ + oxygen
0 1 . 2 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
Rate of photosynthesis in cm3/hour
Temperature in
°C
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
45 1.9 14.2 2.2 2.1
*2*
IB/M/Dec21/8461/1H
, 3
0 1 . 3 Calculate mean value X.
[2 marks]
X = ____________________________________________________ cm3/hour
The students identified one anomalous result in Table 1.
0 1 . 4 Draw a ring around the anomalous result in Table 1.
[1 mark]
0 1 . 5 Suggest one possible cause of the anomalous result.
[1 mark]
0 1 . 6 How did the students deal with the anomalous result?
[1 mark]
0 1 . 7 Give one factor the students should have kept constant in this
investigation. [1 mark]
Turn over ►
*3*
IB/M/Dec21/8461/1H
Centre number Candidate number
Surname
Forename(s)
Candidate signature
GCSE
BIOLOGY
Higher Tier Paper 1H
Monday 6 December 2021 Morning Time allowed: 1 hour
Materials
For this paper you must have: For Examiner’s Use
● a ruler
Question Mark
● a scientific calculator.
1
Instructions
2
● Use black ink or black ball-point pen.
● Fill in the boxes at the top of this page. 3
● Answer all questions in the spaces provided. 4
● Do all rough work in this book. Cross through any work you do not want to
be marked. 5
● In all calculations, show clearly how you work out your answer. TOTAL
Information
● The maximum mark for this paper is 52.
● 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.
DEC2184611H01 IB/M/Dec21/E11 8641/1H
, 2
Answer all questions in the spaces provided.
0 1 This question is about photosynthesis.
0 1 . 1 Complete the word equation for photosynthesis.
[2 marks]
_________________________________________ + _________________________________________ → _________________________________________ + oxygen
0 1 . 2 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
Rate of photosynthesis in cm3/hour
Temperature in
°C
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
45 1.9 14.2 2.2 2.1
*2*
IB/M/Dec21/8461/1H
, 3
0 1 . 3 Calculate mean value X.
[2 marks]
X = ____________________________________________________ cm3/hour
The students identified one anomalous result in Table 1.
0 1 . 4 Draw a ring around the anomalous result in Table 1.
[1 mark]
0 1 . 5 Suggest one possible cause of the anomalous result.
[1 mark]
0 1 . 6 How did the students deal with the anomalous result?
[1 mark]
0 1 . 7 Give one factor the students should have kept constant in this
investigation. [1 mark]
Turn over ►
*3*
IB/M/Dec21/8461/1H
