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Question

The haemoglobin of a human foetus


A
Has a higher affinity for oxygen than that of an adult
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B
Has a lower affinity for oxygen than that of the adult
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C
Its affinity for oxygen is the same as that of an adult
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D
Has only 2 protein subunits instead of 4
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Solution

The correct option is A Has a higher affinity for oxygen than that of an adult
  • The oxygen is needed for aerobic respiration and diffuses from a region of high to low concentration from the mother's blood to the blood of the foetus. 
  • The haemoglobin of the foetus has a higher affinity for oxygen than that of adult haemoglobin and so the efficiency of exchange is increased

So, the correct answer is 'Has a higher affinity for oxygen than that of an adult'

Biology

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