bio
A-Level Biology
AQA
Paper 2
Predicted Paper 2023
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
,bio
2
,bio
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
, bio
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
A-Level Biology
AQA
Paper 2
Predicted Paper 2023
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
,bio
2
,bio
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
, bio
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
