Anti Bodies
Each IgA antibody molecule consists of

three polypeptide chain and has two antigen binding site
two polypeptide chain and has one antigen binding site
four polypeptide chain and has two antigen binding site
two polypeptide chain and has two antigen binding site

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Anti Bodies
Monoclonal refers to

a single clone of antibody-producing cells
all the antibody molecules which are identical
the binding with same antigenic site with identical binding affinities
All of these

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Anti Bodies
The main function of antibodies is to

chemically combine with the antigen which induces it, inactivate the antigen and protect the body from disease
generate antigens, thus conferring immunization
protect the circulatory system
kill all the foreign bodies

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