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

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

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Immune Response in biochemistry
If a person is vaccinated against a disease sometime in the past, which of the following is currently in your body?

A very high level of antibodies against the disease antigens
Memory B lymphocytes for the antigen of this disease organism
All of these
The disease organism itself and antigens for the disease organism

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