First slide

Transport of Gases

Question

Which of the following is true about foetal haemoglobin (HbF)?

Difficult

A

Its oxygen-haemoglobin dissociation curve is to the right of the curve for adult haemoglobin (HbA)
B

Its affinity for oxygen is higher than that of adult haemoglobin
C

It contains two alpha chains and two beta chains
D

It binds BPG more tightly than does adult haemoglobin

Solution

The oxygen affinity of HbF is greater than that of HbA. Its oxygen-haemoglobin dissociation curve is to the left of the dissociation curve of HbA.

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