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
protect the circulatory system
kill all the foreign bodies
generate antigens, thus conferring immunization

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Anti Bodies
Monoclonal refers to

All of these
the binding with same antigenic site with identical binding affinities
all the antibody molecules which are identical
a single clone of antibody-producing cells

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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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