Anti Bodies
IgE provides

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

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Anti Bodies
Each IgA antibody molecule consists of

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
three polypeptide chain and has two antigen binding site

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Anti Bodies
The immunoglobulin fold is

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

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