Anti Bodies
Each IgA antibody molecule consists of

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

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Anti Bodies
A polyclonal antibody response

occurs during the lag phase of the immune response
violates clonal selection
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
Type A blood

can always be used to donate to an Rh+ individual
can be used to donate to type B individuals
can be used to donate to type AB individuals
contains type B antigens on the surface of red blood cells

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