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OCR MERGED QUESTION PAPER AND MARK SCHEME GCSE (9–1) Biology B (Twenty First Century Science)J257/04 Depth in Biology (Higher Tier) FOR JUNE 2024$12.39
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Friday 7 June 2024 – Afternoon
GCSE (9–1) Biology B (Twenty First Century Science)
J257/04 Depth in Biology (Higher Tier)
Time allowed: 1 hour 45 minutes
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1 Aerobic and anaerobic cellular respiration take place in human body cells.
(a) Put one tick (✓) in each row of the table to describe aerobic and anaerobic respiration in animal
cells such as human body cells.
Both Neither
Only Only
aerobic and aerobic nor
aerobic anaerobic
anaerobic anaerobic
Is exothermic
Produces lactic acid
Requires glucose
Requires oxygen
[4]
(b) Complete the sentence about ATP production in respiration.
Use words from the list.
more than less than equal to
The amount of ATP produced per molecule of reactant in aerobic respiration is
........................................... the amount of ATP produced per molecule of reactant in anaerobic
respiration. [1]
Turn over
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2 The diagram shows some different species of flowers that grow in a field.
Crocus
Snowdrop
Daisy
Grass
A student wants to estimate the total number of snowdrops in the field.
They collect data from six small squares of the field.
Small square 1 2 3 4 5 6
Number of snowdrops 5 8 2 9 0 6
(a)* Describe a method to collect the data in the table.
Include:
• the apparatus needed
• how to use the apparatus on the field
• how to avoid bias in the data.
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