Suppose someone sneezes while infected with a virus that causes the common cold. What will most likely happen if the droplets
are inhaled by another person?
A.
The person's immune system will shut down.
•B.
The person will be infected by the virus.
C.
The person will come down with the flu.
D.
The person will undergo a genetic mutation.
Answers: 1
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Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?
Answers: 1
Suppose someone sneezes while infected with a virus that causes the common cold. What will most like...
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