1.

The correct statement in respect of protein haemoglobin is that itA. functions as a catalyst for biological reactionsB. maintains blood sugar levelC. act as an oxygen carrier in the bloodD. forms antibodies and offers resistance to diseases

Answer» Correct Answer - C
Haemoglobin acts as oxygen carrier in the blood because four `Fe^(2+)` ions of each haemoglobin can bind with four molecules of `O_2` and form oxyhaemoglobin.
`4Hb+O_2 to underset"Oxyhaemoglobin"(Hb_4O_8)`


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