AQA A-Level Biology Paper 1 Predicted Paper 2023 attached with marking scheme

AQA




A-Level Biology
AQA
Paper 1
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 1 9
B on this paper does not guarantee you 2 5
the same mark in the exam. 3 18
4 12
5 5
 A* 65% 6 11
7 12
 A 55%
8 8
 B 45%
9 11
 C 40% Total 91
 D 35%
 E 30%




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01
To look for the presence of starch in potatoes, a student decided to
observe potato cells under a microscope. The image below shows starch
grains present in potato cells viewed at a magnification of x400.




a) Describe how the student could have prepared the sample to view
under the microscope.
[2 marks]




b) Describe how the student identified that these grains contained
starch.
[2 marks]




c) Calculate the actual length in µm of the starch grain between points
A and B.
[2 marks]




Actual length =

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d) Plants store excess glucose as starch in their cells. Glucose can also
be used to make cellulose to make cell walls.
Explain how the structure of cellulose make it adapted for its function.
[3 marks]




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