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27/07/2021 4:00 pm
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The haemoglobin of a human foetus
(1) has only 2 protein subunits instead of 4
(2) has a lower affinity for oxygen than that of the adult
(3) has a higher affinity for oxygen than that of an adult
(4) its affinity for oxygen is the same as that of an adult
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27/07/2021 4:01 pm
(3) has a higher affinity for oxygen than that of an adult