Gene Expression · Botany

What is the role of sigma factor in bacteria?

  1. Terminates transcription by releasing mRNA
  2. Binds ribosome to start translation
  3. Helps RNA polymerase recognize promoter
  4. Synthesizes protein from the mRNA code
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Correct answer: Helps RNA polymerase recognize promoter

Sigma factor directs RNA polymerase to specific promoter sequences. It is essential for the initiation of transcription.

Difficulty: Medium Question 16 of 19

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