How are HIV virions rendered virulent?
A) The action of protease releases reverse transcriptase and capsomeres after the virion buds from the cell.
B) They bud to the surface of the host cell.
C) They use a chemokine receptor to remove gp120.
D) They bind to smooth muscle cells.
E) They contact the cytoplasmic membrane via gp41.
A
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The maintenance of the HbS (sickle) allele in humans is an example of homozygote advantage
a. True b. False
All EXCEPT which of the following are
disadvantages to sociality? a. predator avoidance b. cannibalism c. competition for food d. contagious diseases e. parasite infestation
What is the ultimate source of electrons for noncyclic electron transport, and thus photosynthesis?
a. ATP b. water c. NADP+ d. oxygen e. chlorophyll
Foxglove produces this valuable medicine used in the treatment of heart disease. The drug containing this compound is known as
A. digitalis. B. aspirin. C. acetaminophen. D. morphine.