Immune Response in biochemistry
Polysaccharides on the surface of infecting microorganisms can also activate complement directly in the absence of

antigen via the alternative pathway
antibody via the alternative pathway
antibody via metabolic pathway
None of these

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Immune Response in biochemistry
Immunological memory is due to

long lived B cells that secrete a specific antigen
short lived macrophage that can recognize specific pathogens
short lived helper T cells that signal macrophage to divide
long lived B cells that secrete a specific antibody

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