What is the role of a promoter in a transcription unit?

What is the role of a promoter in a transcription unit?
  1. To prevent RNA from being translated into protein
  2. To define the boundaries of the region of DNA that would be transcribed
  3. To initiate the process of replication
  4. To catalyze the polymerization of RNA

Solution

A promoter in a transcription unit helps define the boundaries of the region of DNA that would be transcribed.

Asked in: NCERT

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