MHT CET 202622 AprilMorning Shift
- Exam
- MHT CET
- Year
- 2026
- Date
- 22 April
- Shift
- Morning Shift
- Subject
- Biology
- Chapter
- Human Health and Diseases
MHT CET 2026 · 22 April · Morning Shift · Biology · Human Health and Diseases
The antigen binding site of the antibody is formed of ______.
The antigen binding site of the antibody is formed of ______.
Options
- Avariable and constant regions of light chain
- Bvariable and constant regions of heavy chain
- Cvariable regions of both light and heavy chains
- Dconstant regions of both light and heavy chains
Correct answer
C. variable regions of both light and heavy chains
Step-by-step solution
An antibody molecule is composed of four polypeptide chains: two identical light chains and two identical heavy chains.
Each chain consists of a variable region at its N-terminal end and a constant region at its C-terminal end.
The variable regions of both the light and heavy chains come together to form the antigen binding site (paratope), which is highly specific for a particular antigen.
Therefore, the antigen binding site of the antibody is formed of the variable regions of both light and heavy chains.
Answer: variable regions of both light and heavy chains
Each chain consists of a variable region at its N-terminal end and a constant region at its C-terminal end.
The variable regions of both the light and heavy chains come together to form the antigen binding site (paratope), which is highly specific for a particular antigen.
Therefore, the antigen binding site of the antibody is formed of the variable regions of both light and heavy chains.
Answer: variable regions of both light and heavy chains