NEET · Biology · STD 12 - 7. human health and disease

Identify the statement that is NOT correct.

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

Verified Solution

Answer & Solution

Correct Answer

(C) Antigen binding site is located at C-terminal region of antibody molecules.

Step-by-step Solution

Detailed explanation

Each antibody molecule has four peptide chains, two small called light chains and two longer called heavy chains. Hence, an antibody is represented as \(\mathrm{H}_2 \mathrm{~L}_2\).

In an antibody molecule, antigen binding site is located at N-terminal region.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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