Q.

What is the quaternary structure of adult human hemoglobin composed of?

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a

Two α-type and two β-type subunits 

b

Four identical α-type subunits

c

Four identical β-type subunits

d

One α-type and three β-type subunits

answer is C.

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Detailed Solution

Adult hemoglobin is composed of two alpha (α) globin chains and two beta (β) globin chains, each containing a heme group that binds oxygen.

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