The Sigma Factor of E. Coli RNA Polymerase

question 50

Multiple Choice

The sigma factor of E. coli RNA polymerase:

• A) associates with the promoter before binding core enzyme.
• B) combines with the core enzyme to confer specific binding to a promoter.
• C) is inseparable from the core enzyme.
• D) is required for termination of an RNA chain.
• E) will catalyze synthesis of RNA from both DNA template strands in the absence of the core enzyme.