A) acts as an oxygen carrier in the blood
B) forms antibodies and offers resistance to diseases
C) enzymes are specific biological catalysts that can normally function at very high temperature \[\left( T\tilde{\ }1000K \right)\]
D) enzymes are specific biological catalysts that possess well-defined active sites
Correct Answer: A
Solution :
[a] Haemoglobin acts as an oxygen carrier in the blood since it reacts with oxygen to form unstable oxyhaemoglobin which easily breaks to give back haemoglobin and oxygen.
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