Anti Bodies
The humoral immune response relies on the production of soluble proteins called

lymphocytes
macromolecules
antibodies
none of these

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

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