A-LevelBiologyTransport in mammals9700/12 · Oct/Nov 2010 · Q311 Mark

Some babies are born with a hole between the right and left atria. These newly born babies are found to have an increased number of red blood cells. What is the reason for this increase?

AMore blood is needed because it is pumped faster.

BNewly born babies' haemoglobin has a higher affinity for oxygen.

CNewly born babies' haemoglobin molecules only have one haem group.

DThere is less oxygen available to the newly born baby.

✓ Correct answer

D: There is less oxygen available to the newly born baby.

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Topic: Transport in mammals, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Oct/Nov 2010 Paper 1 Variant 2, question 31.

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