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.

Question

Quizplus · Accepted Answer

The sigma subunit of RNA polymerase is crucial for recognizing the promoter regions on DNA, which is essential for the initiation of transcription. Without a functional sigma subunit, the RNA polymerase cannot properly initiate transcription.

A Bacterial Cell Has a Nonsense Mutation That Prevents It