In a regulatory cascade, control at termination requires that

a. one early gene encodes a sigma factor that activates late genes.
b. expression of host genes must be inactivated.
c. all expressed genes be transcribed as a single polycistronic unit.
d. early genes must be switched off before middle or late genes can be expressed.
e. the transcription units be adjacent to each other.


Ans: e

Biology & Microbiology

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