NEET UG 2025 · Zoology · Question 143
NEET 2025 Zoology, question 143
Question 143 of the NEET 2025 paper (code 45) is a Zoology question from Human Health and Disease. Its idea, Antibody Structure, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 3.
Updated 2026-10-08
Q143 · Zoology
Identify the statement that is NOT correct.
- 1Each antibody has two light and two heavy chains.
- 2The heavy and light chains are held together by disulfide bonds.
- 3Antigen binding site is located at C-terminal region of antibody molecules.Official answer
- 4Constant region of heavy and light chains are located at C-terminus of antibody molecules.
Official answer: option 3 · NTA final answer key
Same idea
The only question on Antibody Structure
No other NEET paper from 2017–2026 tested this exact idea.
The chapter
Human Health and Disease in ten years of NEET
33 questions from 2017–2026, asked in 10 of 10 papers, about 3.2 a paper. Immunity and Lymphoid Organs alone had 17.