Anti Bodies
A polyclonal antibody response

violates clonal selection
is produced by several B cells recognizing different pitopes on the same antigen
occurs during the lag phase of the immune response
is produced only in response to polymeric antigens

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

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Anti Bodies
IgE provides

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

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Anti Bodies
The immunoglobulin fold is

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

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