Breathing and Exchange of GasesHard
Question
The haemoglobin of a human foetus
Options
A.has a lower affinity for oxygen than of the adult
B.its affinity for oxygen is the same as that of an adult
C.has only 2 protein subunits instead of 4
D.has a higher affinity for oxygen then that of an adult
Solution
Haemoglobin is the protein that makes red blood corpuscles red, binds easily and reversibly with oxygen. Normal for Haemoglobin are 14 - 20 g/ 100 mL of blood in infants, 13 - 18 g/ 100 mL in adult male and 12 - 16 g/100 mL in adult females. haemoglobin is made up of protein globin bound to the red haem pigment. The globin consists of four polypeptide chains-2 alphe and 2 beta. Foetal haemoglobin does not sickle even in those distined to have sickle cell anaemia, ie, haemoglobin of foetus has higher affinity for oxygen then that an adult
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