A-LevelBiologyTransport in mammals9700/12 · Oct/Nov 2020 · Q351 Mark

Which row is correct about the affinity between haemoglobin and the gases carbon dioxide, carbon monoxide and oxygen? [Figure 35.1]

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Ahighest affinity: carbon monoxide, lowest affinity: oxygen

Bhighest affinity: carbon monoxide, lowest affinity: carbon dioxide

Chighest affinity: oxygen, lowest affinity: carbon monoxide

Dhighest affinity: oxygen, lowest affinity: carbon dioxide

✓ Correct answer

B: highest affinity: carbon monoxide, lowest affinity: carbon dioxide

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Topic: Transport in mammals, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Oct/Nov 2020 Paper 1 Variant 2, question 35.

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