Question

Which of the following RNA polymerase enzyme catalyses the formation of precursor of mRNA (hnRNA)

• A. DNA ligase
• B. RNA Polymerase II
• C. RNA Polymerase I
• D. DNA Polymerase

Answer 1

The correct option is B RNA Polymerase II

A primary transcript is the single-stranded ribonucleic acid product synthesized by transcription of DNA, and processed to yield various mature RNA products such as mRNA, tRNA, rRNA. The primary transcripts designated to be mRNAs are modified in preparation for translation. For example, a precursor messenger RNA (pre-mRNA) is a type of primary transcript that becomes a messenger RNA (mRNA) after processing. RNA polymerase II of eukaryotes transcribes the primary transcript, which is destined to be processed into mRNA.

So, the correct answer is option B.