E.coli RNA polymerase contains multiple subunits,which of the following combinations would result in promoter recognition but no RNA synthesis?
A)" $\sigma$ and β"
B)" $\alpha$ and $\beta$"
C)" $\sigma$,β,β' "
D)" $\alpha$,β,β' "
E)" ω,β,$\alpha$ "

Question

E.coli RNA polymerase contains multiple subunits,which of the following combinations would result in promoter recognition but no RNA synthesis?
A)"  $\sigma$ and β"
B)" $\alpha$ and $\beta$"
C)"  $\sigma$,β,β' "
D)" $\alpha$,β,β' "
E)" ω,β,$\alpha$ "

Quizplus · Accepted Answer

The correct answer is A because the F1F1F1S1F1F1F10 and β subunits are required for promoter recognition, but the absence of the β' subunit would prevent RNA synthesis.

EColi RNA Polymerase Contains Multiple Subunits,which of the Following Combinations σ\sigmaσ

EColi RNA Polymerase Contains Multiple Subunits,which of the Following Combinations $\sigma$