A-LevelBiologyGas exchange9700/12 · May/June 2013 · Q311 Mark
Which statement is true for the Bohr effect?
AAs the partial pressure of carbon dioxide increases the dissociation curve becomes S- shaped (sigmoid).
BAt higher partial pressures of carbon dioxide and equal partial pressures of oxygen, the percentage saturation of haemoglobin with oxygen will be higher.
CThe carbon dioxide in the air prevents haemoglobin becoming fully saturated with oxygen during gas exchange in the lungs.
DThe release of oxygen from haemoglobin is more likely at higher partial pressures of carbon dioxide.
✓ Correct answer
D: The release of oxygen from haemoglobin is more likely at higher partial pressures of carbon dioxide.
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