Once a prophage is present in a bacterial genome, viral genes are reproduced every time the bacterium multiplies. Expression of viral genes, however, is inhibited by a repressor protein. Cell stress can induce the formation of proteases that degrade the repressor. What will result?
A. The bacterium will reject the viral genes.
B. The virus will enter the lytic cycle.
C. The virus will enter the lysogenic cycle.
D. The bacterial genome will be denatured.
Answer: B
You might also like to view...
An ecologist that studies groups of populations that occur together in one area is a(n)______
a. behavioral ecologist d. ecosystem ecologist b. population ecologist e. organismal ecologist c. community ecologist
In the accompanying diagram, ____ is responsible for secreting digestive enzymes into the small intestine and
hormones into the blood.
a. D b. E c. F d. G e. A
A mixed solution of water and small molecules is exposed to a cell membrane and allowed to interact for an hour. Which molecule would be most likely to cross the phospholipid bilayer without the aid of transport proteins and diffuse across the membrane the fastest?
A. NH3 B. CH3COO- C. NH4+ D. Water E. Na+
Which of the observations below were made by Darwin?
a. Highly similar species are clustered in time and space. b. Climate and physical conditions are insufficient to explain the geographic clustering of similar, closely related species. c. Geographic features seem to play an important role in the clustering of similar, closely related species. d. B and C, but not A.