Question

An antibody molecule is characterized by its Y-shaped structure composed of which combination of polypeptide chains?

Options

• Three heavy chains and three light chains

• Two heavy chains and two light chains

• Two heavy chains and four light chains

• Four heavy chains and two light chains

Answer 1

Each antibody is a Y-shaped molecule with a specific composition: two heavy (H) chains and two light (L) chains. These chains are linked together by disulphide bonds, which provide the structural framework for the antibody molecule.