A) two polypeptide chains
B) four polypeptide chains
C) three ammo acids only
D) five nucleotides
Correct Answer: B
Solution :
Immunoglobulins are present in serum and provide immunity to body against diseases. Each immunoglobulin is made up of four pplypeptide chains two heavy weight chains and two light weight chains. These chains are joined to each other by disulphide bonds.
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