Anti Bodies
Cleavage of an IgG molecule by a specific protease can produce

an antigen-binding site and two constant regions
two Fab fragments and one Fc fragment
an inactive mixture of oligopeptides
two heavy chain-light chain dimers

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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
kill all the foreign bodies
protect the circulatory system

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Anti Bodies
A polyclonal antibody response

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

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Anti Bodies
The immunoglobulin fold is

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

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