In the structural diagram of an antibody molecule which portion is occupied by variable chains?
Correct answer: B. Upper region
- A. Lower region
- B. Upper region
- C. Middle region
- D. In between chains
Explanation
The variable chains of an antibody molecule, both the variable heavy chain and the variable light chains, occupy the upper region of the structural diagram. The region is also known as the antigen-binding region. It is responsible for the specificity of the antibody and its ability to bind to different antigens. The lower region of the antibody, known as the constant region, does not contain the variable chains.
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