17) How many sigma (o) subunits are needed to initiate the process of transcript

Question

17) How many sigma (o) subunits are needed to initiate the process of transcription? A) I B) 2 C) 10 D) 20 E) None of the above 18) The specific sequence regions recognized by a sigma (o) subunit are A) 10 and 35 B) -5 and -15 C) -10 and -35 D) -10 and-50 E) None of the above 19) Termination of transcription in bacteria can occur when A) RNA polymerase produces RNA that forms a stem-loop structure followed by a short stretch B) RNA polymerase runs out of phosphoenolpyruvate. C) RNA polymerase is removed from DNA by the rho protein. D) A and B E) A and C

Explanation / Answer

How many sigma subunits are needed to initiate the process of transcription

1sigma subunit

prokaryotic transcription is initiated almost completely by a ?-factor.

The specific sequence region recognised by a sigma subunit are

-10 and -35

Termination of transcription in bacteria can occur when

A. RNA polymerase produces RNA that forms a stem loop structure followed by a short stretch

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