When the immune system of host are exposed to antigen and produces antibodies it is called as:-

How do B-cells of the immune system respond to antigens?

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?

Antigen and Antibody.

Antigens and Antibodies.

Immunity provided by the transfer of antibodies is called

Immunity provided by the transfer of antibodies is called

Cells of immune system thatcause pore formation in the antigen are

The region of antibody that recognises the antigen is called :-