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

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

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Anti Bodies
The main function of antibodies is to

kill all the foreign bodies
protect the circulatory system
chemically combine with the antigen which induces it, inactivate the antigen and protect the body from disease
generate antigens, thus conferring immunization

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Anti Bodies
A polyclonal antibody response

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

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Anti Bodies
Antibodies in the human immune system can identify approximately 108 different molecules Which one of the following is correct?

This diversity is generated from 108 different immunoglobin genes
Most of these antibodies recognize small organic molecules
Many of these molecules are self-antigens
Most of these antibodies recognize proteins

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Anti Bodies
The immunoglobulin fold is

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
both (a) and (b)

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