NEETZoologyMolecular Basis of Inheritance
In bacteria, a single DNA-dependent RNA polymerase is responsible for the transcription of all types of RNA. Which of the following statements correctly describes an associated feature of this process in prokaryotes?
Options
- AThe primary transcript undergoes extensive processing, including capping and tailing, before it becomes active
- BThe core enzyme of RNA polymerase alone is fully capable of initiating, elongating, and terminating the RNA ch
- CTranslation can begin much before the mRNA is fully transcribed, as there is no separation of cytosol and nucl
- DThe RNA polymerase requires a completely different type of promoter sequence to transcribe tRNA as compared to
Correct answer
C. Translation can begin much before the mRNA is fully transcribed, as there is no separation of cytosol and nucl
Step-by-step solution
In bacteria, a single DNA-dependent RNA polymerase catalyzes the transcription of all types of RNA (mRNA, tRNA, and rRNA). Because the bacterial mRNA does not require any post-transcriptional processing (like capping, splicing, and tailing) to become active, and because there is no nuclear envelope separating the site of transcription from the site of translation, ribosomes can attach to the mRNA and begin translation before transcription is fully completed. This leads to coupled transcription and translation. The