Anti Bodies
The immunoglobulin fold is

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

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Anti Bodies
Papain digest IgG into

two Fab fragments and one Fc fragment
three Fab fragments and two Fc fragments
two Fab fragments and two Fc fragments
three Fab fragments and three Fc fragments

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Anti Bodies
Each IgA antibody molecule consists of

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
four polypeptide chain and has two antigen binding site

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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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