A-LevelBiologyGas exchange9700/12 · Feb/Mar 2024 · Q351 Mark

Oxyhaemoglobin, carbaminohaemoglobin, haemoglobinic acid and carbonic anhydrase are found inside red blood cells. How many of these substances will show an overall decrease in concentration as a red blood cell passes through capillaries in the lungs?

✓ Correct answer

B: 2

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Topic: Gas exchange, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Feb/Mar 2024 Paper 1 Variant 2, question 35.

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