Question

What is the role of RNA polymerase III in the process of transcription in Eukaryotes?

Options

• Transcription of tRNA, 5 srRNA and snRNA

• Transcription of precursor of mRNA

• Transcription of only snRNAs

• Transcription of rRNAs (28S, 18S and 5.8S)

Answer 1

Transcription of tRNA, 5 srRNA and snRNA

Explanation:

RNA polymerase III is a multi-unit enzyme. It synthesises RNA molecules from a DNA template through transcription. This enzyme transcribes 5S ribosomal RNA, transfer RNAs (tRNAs), and other small functional RNAs. The regulation of Pol III transcription is mainly linked with the control of cell growth and the cell cycle. Hence, it requires fewer regulatory proteins than RNA polymerase II.