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#Question id: 3868


The sigma factor of E. coli RNA polymerase: 

#SCPH01 Biochemistry
  1. associates with the promoter before binding core enzyme.

  2. combines with the core enzyme to confer specific binding to a promoter.

  3. is inseparable from the core enzyme.

  4. is required for termination of an RNA chain.


Answer:- Option(s): 2


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