Question

How do you differentiate antigen and antibody?

Answer 1

Answer:

=> Antigen

             >> These are substances that provoke an immune response.

             >> Cause disease or allergic reactions.

             >> Within the body or externally.

             >> Exists in all types of cells; mostly found in viruses, bacteria, and fungi.

             >> Medium; exists due to random mutations in the cell’s gene.

             >> There are three basic kinds of antigens (Exogenous, Endogenous, and Autoantigens)

=> Antibody

             >> These are Glycoproteins that are secreted by immune cells (plasma cells) in response to a foreign substance (antigen).

             >> Protect the system by lysis of antigenic material.

             >> Within the body.

             >> Only present in some types of cells.

             >> Very High; Complex chemical that bonds to a very specific Antigen.

             >> There are five basic kinds of antibodies (IgG, IgM, IgA, IgE, and IgD).

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Answer 2

Antigens are molecules capable of stimulating an immune response. Each antigen has distinct surface features, or epitopes, resulting in specific responses.

Antibodies (immunoglobins) are Y-shaped proteins produced by B cells of the immune system in response to exposure to antigens. Each antibody contains a paratope which recognizes a specific epitope on an antigen, acting like a lock and key binding mechanism. This binding helps to eliminate antigens from the body, either by direct neutralization or by ‘tagging’ for other arms of the immune system.