Question

What is the role of RNA polymerase III?

(a) Transcription of rRNAs

(b) Transcription of mRNAs

(c) Transcription of tRNAs

(d) Transcription of hnRNA

This question was posed to me in an international level competition.

My enquiry is from Molecular Basis of Inheritance in division Molecular Basis of Inheritance of Biology – Class 12

Answer 1

Correct choice is (c) Transcription of tRNAs

To explain I would say: rRNAs are transcribed with the help of RNA polymerase I. RNA polymerase II is responsible for the transcription of mRNA, which is the heterogeneous nuclear RNA (hnRNA). RNA polymerase III transcribes the tRNAs, 5srRNAs and snRNAs.