Botany (M.Phil./Ph.D.) 2019 Panjab University Entrance Exam With Answers

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37.

Major function of σ-Subunit of E. coli RNA polymerase during transcription is to:

A: Initiate transcription and does not fall off during elongation
B: Decreases affinity of core enzyme to promoter
C: Binds to DNA independent of core enzyme
D: Ensure recognition of promoter region by interacting with core enzyme

The answer is: D