The variable regions of both heavy and light chains of an antibody significantly play an important in the recognition and binding of antigens. Thus, the correct option is B.
An Antibody may be defined as a form of protein that is synthesized by the plasma cells of B lymphocytes in response to specific antigens. Antibodies are also known as Immunoglobulin. It is a Y-shaped molecule that recognizes and binds antigens.
Variable heavy (VH) and variable light (VL) interact with antigens specifically. This is because the variable regions are specific for only a single type of epitope binding on both sides.
Such type of epitopes binds to the paratope of an antibody. It is considered the antigen binding site. While constant regions provide flexibility to the variable regions.
Therefore, the variable regions of both heavy and light chains of an antibody significantly play an important in the recognition and binding of antigens. Thus, the correct option is B.
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