Helper T cells secrete ____, which activate B cells and stimulate their proliferation
a. antigens
b. allergens
c. antibodies
d. interferons
e. interleukins
ANSWER: e
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Because of their environments and physiology, there is great interest in using members of the sulfate-reducing bacteria (SRB) Shewanella and Geobacter in bioremediation or to generate electricity in microbial fuel cells.
Answer the following statement true (T) or false (F)
The antibodies produced by the B cells are each made up of ______ light chain(s) and _______ heavy chains(s)
a. one; one b. one; two c. two; one d. two; two e. two; three
If a person is poisoned with cyanide they cannot generate ATP and die within a few minutes. In this scenario, what would happen to sodium and potassium concentrations across a cell membrane?
A. Sodium would be higher outside the cell and potassium would be higher inside the cell. B. Sodium would be higher inside the cell and potassium would be higher outside the cell. C. Sodium and potassium would reach equilibrium. D. Sodium and potassium concentrations would both be higher outside the cell. E. Sodium and potassium concentrations would both be higher inside the cell.
Which zone of the ocean is found above the
continental shelf? a. abyssal b. benthic c. pelagic d. neritic e. oceanic