A) functions as a catalyst for biological reactions
B) maintains blood sugar level
C) act as an oxygen carrier in the blood
D) forms antibodies and offers resistance to diseases
Correct Answer: C
Solution :
Haemoglobin acts as oxygen carrier in the blood because four Fe ions of each haemoglobin can bind with four molecules of \[{{O}_{2}}\]and form oxyhaemoglobin. \[4Hb+4{{O}_{2}}\xrightarrow[{}]{{}}\underset{Oxy-haemoglobin}{\mathop{H{{b}_{4}}{{O}_{8}}}}\,\]
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