A) secondary structure
B) tertiary structure
C) quaternary structure
D) All of the above
Correct Answer: C
Solution :
Haemoglobin is a globular protein with quaternary structure. It consists of four polypeptide subunits, two of one kind (a chains) and two of another kind (\[\beta \]chains). Each subunit has a non-polypeptide component called home with an iron atom that binds oxygen.
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