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Question

The quaternary structure of human haemoglobin is a

A
homogenous dimer
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B
heterogenous dimer
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C
heterogenous tetramer
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D
homogenous tetramer
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Solution

The correct option is C heterogenous tetramer
Haemoglobin consists of 4 subunits. Two of these are identical to each other. Hence, two subunits of one type and two subunits of another type together constitute the human haemoglobin (Hb) molecule.

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