You wish to design a drug that acts against a recently identified retrovirus. Based upon what you know about retroviruses, which of the following would be the best target for specifically interrupting the viral life cycle in eukaryotic cells?
A) primase
B) 30S ribosomal subunits
C) reverse transcriptase
D) RNA polymerase
E) DNA polymerase
Answer: C
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The conversion of nitrate (NO3-) to nitrogen gas (N2) is called ________.
A. ammonification B. nitrogen fixation C. photosynthesis D. nitrification E. denitrification
What is thought to be the reason for the decline of stromatolites? a. Coral bleaching
b. Depletion of oxygen levels. c. Absence of symbiotic mollusks and crustaceans. d. Competition from seaweeds and sponges.
Control of smooth muscle and internal organs is the role of the ________ division of the nervous system
A) sensory B) autonomic C) endocrine D) somatic E) postsynaptic
During __________ between predator and prey species, the predatory species becomes more efficient
at catching prey, while the prey species becomes better at escaping predators. a. character displacement b. coevolution c. Batesian mimicry d. competitive exclusion e. succession