Question

Which of the following is untrue?

(a) RNA polymerases I is responsible for the transcription of ribosomal RNA

(b) RNA polymerases III is responsible for the transcription of tRNA

(c) RNA polymerase II is exclusively responsible for transcribing protein-encoding genes

(d) Synthesis of mRNAs is carried out by RNA polymerase I

The question was posed to me during an online interview.

My doubt stems from Promoter and Regulatory Elements in Prokaryotes & Eukaryotes topic in chapter Promoter and Regulatory Element Prediction of Bioinformatics

Answer 1

Right option is (d) Synthesis of mRNAs is carried out by RNA polymerase I

The explanation is: Ach polymerase transcribes different sets of genes. RNA polymerase II is exclusively responsible for transcribing protein-encoding genes or synthesis of mRNAs.