Anti Bodies
Each IgA antibody molecule consists of

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

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Anti Bodies
IgE provides

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

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Anti Bodies
The immunoglobulin fold is

both (a) and (b)
a β-barrel composed of a three- and a four-stranded antiparallel β-sheet
found only in IgG molecules
found six times in the IgG molecule

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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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