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7.Human Health and Disease
normal
The antigen-binding site are present where on the antibody molecule
A
on light chain as well as on heavy chain
B
on light chain only
C
on variable region and constant region of light chain
D
on heavy chain only
(AIIMS-2009)
Solution
The $Y-$ shaped antibody molecule is composed of $4$ polypeptide chains – two identical light chains and two heavy chains held together by disulphide bonds. Antigen-binding site is formed on antibody molecule where a heavy chain variable and a light chain variable come closer.
Standard 12
Biology
