1.

The sigmoid nature of Hb-O2 dissociation curve is because of -

A. Beta chain has more affinity for O2 than alpha chain
B. Hemoglobin in acidic in nature
C. Binding of one O2 molecule increase the affinity for the next O2 molecule
D. Alpha chain has more affinity for O2 than beta chain
Answer» D. Alpha chain has more affinity for O2 than beta chain


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