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 :
Sol. Haemoglobin acts as an oxygen carrier in the blood because four\[F{{e}^{2+}}\]ions of haemoglobin can bind with four molecules of\[{{O}_{2}}\]and form oxyhaemoglobin. \[Hb+{{O}_{2}}\xrightarrow{{}}Oxyhaemoglobin\]
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