Which part of the antibody recognizes the antigen during immune response?
Correct answer: B. Variable part
- A. Heavy part
- B. Variable part
- C. Light part
- D. Constant part
Explanation
The variable regions of an antibody are responsible for antigen recognition and binding. Antibodies are the soluble proteins produced in response to an antigen by the B-cells. They are Y-shaped molecules consisting of four polypeptide chains: two identical heavy chains and two identical light chains. The two ends or tips of the Y-shaped molecule of an antibody are the variable regions, which are the parts of the antibody that combines with the antigen. The variable regions of a particular antibody can only join with a particular antigen.
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