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  • The RNA polymerase holoenzyme transcribes: a. the promoter, structural gene and the terminator region b. the promoter and the terminator region c. the structural gene and the terminator region d. the structural gene only

The RNA polymerase holoenzyme transcribes:

a. the promoter, structural gene and the terminator region

b. the promoter and the terminator region

c. the structural gene and the terminator region

d. the structural gene only

Answers (1)

Transcription occurs in three steps: initiation, elongation and termination. For initiation of transcription, the sigma factor of RNA polymerase is required and for termination, the rho factor encounters the RNA polymerase. The promoter and terminator regions are useful for initiating and terminating the transcription process only. They do not get transcribed into RNA. Only the structural gene that is situated between the promoter and terminator regions of the transcription unit gets transcribed into RNA. The answer is option (d) the structural gene and the terminator regions

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