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A-LevelBiologyGas exchange9700/12 · Feb/Mar 2025 · Q291 Mark

The graph shows the dissociation curves for haemoglobin at two different partial pressures of carbon dioxide. Which labelled point on the oxygen dissociation curves will result in the highest concentration of haemoglobinic acid? [Figure 29.1]

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AA
BB
CC
DD

✓ Correct answer

B: B

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Topic
Gas exchange, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source
A-Level Biology, Feb/Mar 2025 Paper 1 Variant 2, question 29.

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