Question

The given figure represents the termination process of transcription in bacteria. Identify A, B and C respectively

• A. A-DNA, B-RNA polymerase, C-Rho factor
• B. A-RNA, B-RNA polymerase, C-Rho factor
• C. A-RNA, B-RNA polymerase, C-Sigma factor
• D. A-RNA, B-DNA polymerase, C-Sigma factor

Hint:

Rho-dependent termination requires RNA, RNA polymerase, and Rho protein. Sigma factor is for promoter recognition. Visualizing steps of transcription initiation and termination helps in remembering A, B, C roles.

Answer 1

The Correct Option is B

In bacteria, transcription termination can be Rho-dependent. - A = newly synthesized RNA transcript. - B = RNA polymerase synthesizing RNA. - C = Rho factor, which is a helicase that moves along RNA to unwind the DNA-RNA hybrid and terminate transcription. Sigma factor is only required for initiation, not termination.