classification of antibodies

Antibody is

Antibody

An antibody is a

An antibody is a

Protective proteinous chemical compounds produed by the immune cells in response to antigens are called antibodies, also called immunoglobulins. There are five classes of antibodies: IgA, IgD, IgE, IgG and IgM. Following diagram is that of a specific class of antibodies. Observe the diagram and answer the questions listed below the diagram: (i) To which class of antibodies, this antibody belongs to ? (ii) Identify the parts of the diagram labelled as A and B. (iii) Give the name of the part of antibody which binds the antigen. (iv) Which type of immune system is formed by the antibodies?

An antibody is a:

The antibodies are