In an antibody- mediated immune response,

what causes effector helper T cells to release
cyokines?



a. binding to antigen presenting dendritic cells
b. binding to a bacterial complement
c. binding to a naive helper T cell
d. binding to a B cell
e. engulfing a bacterium


D

Biology & Microbiology

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a. an amine group, a carboxyl, and a side chain b. a nitrogenous base, a sugar, and one or more phosphate groups c. a nitrogenous base, a carboxyl, and a side chain d. an amino, a phosphate group, and a fatty acid chain

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All EXCEPT which of the following has an effect on

seed germination? a. moisture b. temperature c. carbon dioxide d. number of daylight hours e. oxygen

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Use a specific example to explain how a negative feedback mechanism may be used to regulate the

function of endocrine glands. What will be an ideal response?

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Infections of Bacillus anthracis are initiated by

a) endospores. b) endotoxins. c) exotoxins. d) capsules.

Biology & Microbiology