Answer :
Answer:
Composed of heavy and light polypeptide chains.
Explanation:
Antibodies are generated by the immune system mostly by the plasma cells in acknowledgment of the existence of any foreign substance, known as an antigen via the fragment antigen-binding (Fab) variable region.
Antibodies are Y-shaped in a structure that contains 4 polypeptides 2 heavy chains and 2 light chains. This structure of antibody helps to reach their dual functions one is antigen binding and another is biological activity mediation.