Solution

Rho ($\rho$) factor terminates prokaryotic transcription.

In prokaryotic transcription, sigma ($\sigma$) factor is required for initiation at promoters, while rho ($\rho$) factor binds the nascent transcript to release the RNA polymerase and terminate transcription.

Concept Transcription Termination Factor

Transcription in Prokaryotes in past papers

2 questions from this chapter have appeared across 2 exam years.