A bacterial cell has a nonsense mutation that prevents it from producing a functional sigma subunit for RNA polymerase.Inability to synthesize a functional sigma subunit would have the most direct effect on
A)transcription initiation.
B)transcription elongation.
C)transcription termination.
D)translation initiation.
E)translation termination.

Question

Quizplus · Accepted Answer

The sigma subunit of RNA polymerase is responsible for recognizing and binding to the promoter sequence on DNA to initiate transcription. Without a functional sigma subunit, the bacterial cell would not be able to properly initiate transcription, leading to a direct effect on transcription initiation. The other options (B, C, D, and E) are not directly influenced by the absence of a functional sigma subunit.

A Bacterial Cell Has a Nonsense Mutation That Prevents It