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
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What are the components of nucleotides?
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
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
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?
Infections of Bacillus anthracis are initiated by
a) endospores. b) endotoxins. c) exotoxins. d) capsules.