Question

RNA polymerase I: _________ :: _________ : Transcribes tRNA
[1 mark]

• A. Transcribes sRNA ; RNA polymerase II
• B. Transcribes hnRNA ; RNA polymerase III
• C. Transcribes snRNA ; RNA polymerase II
• D. Transcribes rRNA ; RNA polymerase III

Answer 1

The correct option is D Transcribes rRNA ; RNA polymerase III

Transcription is the process of copying genetic information from one strand of the DNA into RNA.

RNA polymerase is essential for the initiation of transcription. In eukaryotes there are different types of RNA polymerase responsible for transcribing the other essential components as follows :

• RNA polymerase I - Transcribes rRNA
• RNA polymerase II - Transcribes hnRNA or heterogeneous nuclear RNA(a precursor of mRNA)
• RNA polymerase III - Transcribes tRNA, 5srRNA and snRNA (small nuclear RNA)

Hence option d is correct.