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

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

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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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0 1 . 3 Many animals are adapted to their environments by having different types of box
haemoglobin with different tertiary structures.

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




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