A PAPER 1 QUESTION PAPER
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Oxford Cambridge and RSA
Friday 20 May 2022 – Afternoon
AS Level Biology A
H020/01 Breadth in biology
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• Read each question carefully before you start your answer.
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2
SECTION A
You should spend a maximum of 25 minutes on this
section. Write your answer for each question in the box
provided.
Answer all the questions.
1 The graph below shows the results of an osmosis experiment investigating the effect
of changing the concentration of sodium chloride (NaCl) on mass of potatoes.
10
5
Percentage
change in
0.1 0.2 0.3 0.4 0.5 0.6
0 mass
NaCl
– concentration
5 (mol dm–3)
–
10
Which concentration of NaCl causes equal movement of water into and out of the
potato?
A 0.36 mol dm–
3
B 0.40 mol
dm–3 C 0.42
mol dm–3 D
0.62 mol dm–3
Your answer [1]
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