Question

Identify the statement that is NOT correct.

• A. The heavy and light chains are held together by disulfide bonds.
• B. Antigen binding site is located at C-terminal region of antibody molecules.
• C. Constant regions of heavy and light chains are located at C-terminus of antibody molecules.
• D. Each antibody has two light and two heavy chains.

Hint:

Antigen-binding = N-terminal (Variable region).

Answer 1

The Correct Option is B

The antigen-binding site of an antibody is located at the \textit{N-terminal} region (variable region), not the C-terminal region. The other statements are correct: Heavy and light chains are linked by disulfide bonds, constant regions are at the C-terminus, and each antibody has two heavy and two light chains.