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

Constant regions
Only heavy chains
Only light chains
Variable regions

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Anti Bodies
IgE provides

All of these
secretions in the body
complement killings of the cells and phagocytosis
immunity against some parasites

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Anti Bodies
Each IgA antibody molecule consists of

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

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