Exam (elaborations)
AQA A-level BIOLOGY Paper 2 June 2024 / 7402/2
AQA A-level BIOLOGY Paper 2 June 2024 / 7402/2 All questions
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AQAPlease write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
BIOLOGY
Paper 2
Friday 14 June 2024 Morning Time allowed: 2 hours
Materials For Examiner’s Use
For this paper you must have:
a ruler with millimetre measurements Question Mark
a scientific calculator. 1
2
Instructions
Use black ink or black ball-point pen. 3
Fill in the boxes at the top of this page. 4
Answer all questions. 5
You must answer the questions in the spaces provided. Do not write
6
outside the box around each page or on blank pages.
If you need extra space for your answer(s), use the lined pages at the end of 7
this book. Write the question number against your answer(s). 8
Show all your working. 9
Do all rough work in this book. Cross through any work you do not want
10
to be marked.
TOTAL
Information
The marks for the questions are shown in brackets.
The maximum mark for this paper is 91.
,7402/2
,0 1 Figure 1 shows a drawing of a neuromuscular junction.
Figure 1
0 1 . 1 Name the parts labelled A to D.
[2 marks]
A
B
C
D
, 0 1 . 2 Following the release of acetylcholine into a neuromuscular junction, a muscle
contraction occurs.
Describe the sequence of events, following the release of acetylcholine, that leads to
stimulation of this contraction.
Do not include in your answer the events following the release of calcium ions in the
myofibril.
[4 marks]
0 1 . 3 Inhibitory synapses cause hyperpolarisation in postsynaptic neurones.
Explain how this inhibits synaptic transmission.
[2 marks]
8
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