Question

9. Describe the structure of an antibody and explain how the antibodies attack destroy the

pathogen.

Answer 1

An antibody is a Y -shaped structure which consists of four polypeptides — two heavy chains and two light chains. White blood cells called a lymphocytes recognise the antigen as being foreign and produces antibodies that are specific to that antigen. Each antibody has a unique binding site shape which locks onto the specific shape of the antigen. The antibodies destroy the antigen (pathogen) and then engulf and digest it with macrophages.

Answer 2

An antibody is a Y -shaped structure which consists of four polypeptides — two heavy chains and two light chains. White blood cells called a lymphocytes recognise the antigen as being foreign and produces antibodies that are specific to that antigen. Each antibody has a unique binding site shape which locks onto the specific shape of the antigen. The antibodies destroy the antigen (pathogen) and then engulf and digest it with macrophages.