NEET2026BiologyChapterActual
Which of the following statements correctly describes the process of transcription in bacteria?
Options
- AA single type of DNA-dependent RNA polymerase is responsible for the transcription of all types of RNA.
- BThe DNA-dependent RNA polymerase catalyzes the polymerization of RNA strictly in the 3^ 5^ direction.
- CThe core RNA polymerase permanently associates with the sigma ( ) factor throughout the elongation phase.
- DThe RNA polymerase requires a short RNA primer to initiate the transcription of the structural gene.
Correct answer
A. A single type of DNA-dependent RNA polymerase is responsible for the transcription of all types of RNA.
Step-by-step solution
In bacteria, a single DNA-dependent RNA polymerase catalyzes the transcription of all types of RNA (mRNA, tRNA, and rRNA). The DNA-dependent RNA polymerase catalyzes the polymerization of RNA strictly in the 5^ 3^ direction, not 3^ 5^ . The sigma ( ) factor associates with the core RNA polymerase only transiently during the initiation phase and dissociates once elongation begins. Unlike DNA polymerase, RNA polymerase does not require any primer to initiate transcription. Answer: A single type of DNA-dependent RNA p