CAPE Biology Unit 2 · 2015 · Paper 1 · Question Q24

Which of the following explains the physiological significance of the Bohr effect in mammalian muscle?

1. (A)Myoglobin releases oxygen more rapidly to respiring cells.
2. (B)Higher carbon dioxide partial pressures favour unloading of oxygen from haemoglobin.
3. (C)Myoglobin becomes fully saturated at lower oxygen partial pressures.
4. (D)Haemoglobin becomes fully saturated at lower oxygen partial pressures.