Which antibody confers the most important specific local immunity to enteric, respiratory, and genitourinary pathogens?

A. IgG
B. IgE
C. IgM
D. IgD
E. IgA


Answer: E

Biology & Microbiology

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What will be an ideal response?

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When MSH2 and MLH1 are inactivated by mutation, DNA repair is defective and ____________________ mutation

rates increase by at least 100-fold. Fill in the blank(s) with the appropriate word(s).

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Two major types of protein secondary structures are referred to as:

a. amino and carboxyl. b. ? helix and ? sheet. c. elementary and primary. d. residual and permanent. e. ionic and covalent.

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Fruit structure is adapted to ________, which spread seeds far and wide, thus ensuring reproductive success by minimizing competition among parent and offspring.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology