- A Three largely separate RNA polymerase enzymes transcribe rRNA, tRNA, and mRNA respectively in bacterial cells
- B A single RNA polymerase, with the help of factors like sigma and rho, catalyses transcription of all RNA types
- C RNA polymerase in bacteria highly requires a short RNA or DNA primer in order to begin transcription
- D RNA polymerase in bacterial cells is understood to synthesise new RNA strands in the 3 prime to 5 prime direction
Correct answer: B. A single RNA polymerase, with the help of factors like sigma and rho, catalyses transcription of all RNA types
Explanation: In bacteria, unlike eukaryotes, a single RNA polymerase catalyses transcription of mRNA, tRNA, and rRNA; sigma factor helps with initiation and rho factor helps with termination.
Concept context
DNA structure, replication, transcription, translation, the genetic code, and gene regulation (lac operon). The single most important chapter for NEET molecular biology.