Anti Bodies
Antigenic determinants bind to which portions of an antibody?

Constant regions
Only light chains
Only heavy chains
Variable regions

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Anti Bodies
Each IgA antibody molecule consists of

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

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Anti Bodies
The main function of antibodies is to

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

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