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Based on Figure 19

Question 185

Multiple Choice

Based on Figure 19.21, below, which of the following is NOT an accurate description of events leading to the lytic pathway following viral infection in a bacterium? Based on Figure 19.21, below, which of the following is NOT an accurate description of events leading to the lytic pathway following viral infection in a bacterium?   A) Upon infection, transcription is initiated from promoters P<sub>L</sub> and P<sub>R</sub>. B) The transcripts from P<sub>R</sub> encode the proteins cro and cII. C) The cro protein represses transcription from P<sub>M</sub> so that the cl protein is not transcribed. D) Strong protease activity rapidly degrades cII, and cro continues to repress cI expression, leading to the lytic path. E) Reduced protease activity due to poor conditions allows cII to accumulate, which then stimulates transcription from P<sub>E</sub> and thus expression of cI.


A) Upon infection, transcription is initiated from promoters PL and PR.
B) The transcripts from PR encode the proteins cro and cII.
C) The cro protein represses transcription from PM so that the cl protein is not transcribed.
D) Strong protease activity rapidly degrades cII, and cro continues to repress cI expression, leading to the lytic path.
E) Reduced protease activity due to poor conditions allows cII to accumulate, which then stimulates transcription from PE and thus expression of cI.

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