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A-Level Biology Paper 2 Predicted Paper 2023 attached with marking scheme $24.49
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A-Level Biology Paper 2 Predicted Paper 2023 attached with marking scheme

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AQA A-Level Biology Paper 2 Predicted Paper 2023 attached with marking scheme Name …………………………………………………………………… Date ………………… 2 hours allowed. You may use a scientific calculator and a ruler with millimetre measurements. ...

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  • May 5, 2023
  • 35
  • 2022/2023
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A level biology ppr 2 2023




AQA
A-Level Biology Paper 2
Predicted Paper 2023 attached with marking scheme


Name ……………………………………………………………………
Date …………………


2 hours allowed.
You may use a scientific calculator and a ruler with millimetre
measurements.




Grade boundaries Possible Marks
Question
marks gained
These are VERY rough guesses! Getting a B on 1 13
this paper does not guarantee you the same 2 15
mark in the exam. 3 10
4 9
5 11
 A* 65% 6 6
7 10
 A 55%
8 8
 B 45%
9 9
 C 40% Total 91
 D 35%
 E 30%




1

,A level biology ppr 2 2023




2

,A level biology ppr 2 2023



01
The image below shows a transmission electron micrograph of a
longitudinal section of skeletal muscle viewed at x40 000
magnification.




a) Name structures T, U and V.
[3 marks]
T:
U:
V:

b) What is the name of the structure between points V and W?
[1 mark]


c) Explain what causes the banding pattern seen.
[2 marks]




d) Glycogen granules can be seen labelled in the image.
In which type of muscle fibre would you expect to find high
concentrations of glycogen granules?
Explain your answer.
[2 marks]




3

, A level biology ppr 2 2023



e) During a contraction, muscle fibres shorten on average by around
28%.
Estimate the distance between points V and W in µm if this muscle
was contracted.
[3 marks]




f) Some toxins and venoms produced by predators prevent muscle
contraction, paralysing their prey. The molecular structure of a kind
of snake venom is very similar to the molecular structure of
acetylcholine.
Explain how this venom could prevent muscle contraction.
[2 marks]




4

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