A) Acts as an oxygen carrier in the blood
B) Forms antibodies and offers resistance to diseases
C) Functions as a catalyst for biological reactions
D) Maintains blood sugar level
Correct Answer: A
Solution :
Four \[F{{e}^{2+}}\] ions of each haemoglobin can bind with 4 molecules of \[{{O}_{2}}\] and it is carried as oxyhaemoglobin. \[H{{b}_{4}}+4{{O}_{2}}\to H{{b}_{4}}{{O}_{8}}\]
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