Question

Consider the following statements regarding eukaryotes.
I. RNA polymerase I transcribes rRNAs
II. RNA polymerase II transcribes snRNAs
III. RNA polymerase III transcribes hnRNA
IV. RNA polymerase III transcribes tRNA
Which of the statements given above are correct?

• A. I and II
• B. I and III
• C. I and IV
• D. I, II, III

Answer 1

The correct option is C I and IV

The enzyme required for copying genetic information from one strand of DNA into RNA (transcription) is DNA dependent RNA polymerase.

In eukaryotes, there are at least three RNA polymerases.

RNA polymerase I transcribes rRNA (28S, 18S and 5.8S).

RNA polymerase II is responsible for the transcription of the precursor of mRNA, the heterogeneous nuclear RNA (hnRNA).

RNA polymerase III is responsible for the transcription of tRNA, 5srRNA, and snRNAs (small nuclear RNAs).

Therefore, only I and IV are correct.