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Haemoglobin has four types of polypeptide chains.

Haemoglobin has two types of polypeptide chains.

Haemoglobin shows only tertiary structure.

Haemoglobin has only two polypeptide chains.

answer is B.

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Detailed Solution

Haemoglobin is a tetrameric protein with two types of polypeptide chains. These are two alpha and two beta units.

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