A-level
BIOLOGY
Paper 2
Friday 14 June 2024 Morning Time allowed: 2 hours
Materials
For this paper you must have:
• a ruler with millimetre measurements
• a scientific calculator.
Instructions
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page...
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 6
not write outside the box around each page or on blank
pages. 7
If you need extra space for your answer(s), use the lined pages at 8
the end of this book. Write the question number against your 9
answer(s).
10
Show all your working.
Do all rough work in this book. Cross through any work you do TOTAL
not want to be marked.
Information
The marks for the questions are shown in brackets.
The maximum mark for this paper is 91.
Paper2 biology
,Paper 2 biology
IB/M/Jun24/G4006/E7 7402/2
Paper2 biology
, 2
Do not write
outside the
Answer all questions in the spaces box
provided.
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
IB/M/
Jun24/7402/2
, 3
Do not write
outside the
0 1 . 2 Following the release of acetylcholine into a neuromuscular junction, a box
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
Turn over ►
IB/M/
Jun24/7402/2
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