Question

The Rho protein helps to:

• A. to stop translation
• B. to terminate transcription
• C. to bind RNA polymerase to the DNA
• D. to help RNA polymerase finding the promoter site

Answer 1

The correct option is B to terminate transcription

Transcription process will keep on happening until it gets signals to stop; the process by which transcription ends is called termination. This is possible only when the terminator sequence of the DNA gets transcribed. RNA termination follows two strategies; Rho dependent and Rho independent. In a Rho dependent process, RNA polymerase will have binding site for Rho factor, when the Rho – RNA couple meet the RNA polymerase it pulls apart the RNA from DNA, thus stopping transcription.

Transcription factors may bind directly to the special promoter regions of DNA or to the RNA polymerase enzyme.. Transcription factors can activate or repress the transcription of gene.