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2025 AQA AS BIOLOGY Paper 2 Question Paper & Mark Scheme (Merged) Thursday 22 May 2025 [VERIFIED]

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2025 AQA AS BIOLOGY Paper 2 Question Paper & Mark Scheme (Merged) Thursday 22 May 2025 [VERIFIED] 2 Do not write outside the for more resources IB/M/Jun25/7401/2 Answer all questions in the spaces provided. box Figure 1 shows the arrangement of some of the blood vessels in a mammalian circulatory system. Figure 1 . Name the blood vessels labelled B and E in Figure 1. [2 marks] B E . Give the letters of all the blood vessels shown in Figure 1 that transport d

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2025 AQA AS BIOLOGY Paper 2

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2025 AQA AS BIOLOGY Paper 2 Question Paper & Mark Scheme (Merged)
Thursday 22 May 2025 [VERIFIED]

, 2
Do not write
outside the
Answer all questions in the spaces provided. box


0 1 Figure 1 shows the arrangement of some of the blood vessels in a mammalian circulatory system.

Figure 1




0 1 . 1 Name the blood vessels labelled B and E in Figure 1.
[2 marks]

B

E



0 1 . 2 Give the letters of all the blood vessels shown in Figure 1 that transport deoxygenated
blood.
[1 mark]




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IB/M/Jun25/7401/2

, 3
Do not write
outside the
0 1 . 3 Many animals are adapted to their environments by having different types of haemoglobin with box
different tertiary structures.

Using your knowledge of the structure of proteins, explain how different types of haemoglobin
can have different tertiary structures.
[3 marks]




Question 1 continues on the next page




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IB/M/Jun25/7401/2

, 4
Do not write
Turn over ► outside the




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IB/M/Jun25/7401/2
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January 15, 2026
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