Question: 95. What is the role of RNA polymerase III in the process of transcription in Eukaryotes?
(1) Transcription of precursor of mRNA
(2) Transcription of only snRNAs
(3) Transcription of rRNAs (28S, 18S and 5.8S)
(4) Transcription of tRNA, 5 srRNA and snRNA
Answer: Option (4)
Explanation:
In eukaryotic cells, transcription is carried out by three different RNA polymerases,
each having a specific role.
RNA polymerase I is responsible for the transcription of major rRNAs, namely 28S,
18S, and 5.8S.
RNA polymerase II transcribes precursor mRNA and some snRNAs.
RNA polymerase III is responsible for the transcription of transfer RNA and small RNA molecules.
Specifically, RNA polymerase III synthesizes tRNA, 5S rRNA, and certain snRNAs.
Hence, the correct answer is Option (4).