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Each IgA antibody molecule consists of | |
A. | four polypeptide chain and has two antigen binding site [Correct Answer] |
B. | two polypeptide chain and has one antigen binding site [Wrong Answer] |
C. | three polypeptide chain and has two antigen binding site [Wrong Answer] |
D. | two polypeptide chain and has two antigen binding site [Wrong Answer] |