Question

The enzyme involved in eukaryotic transcription:

• A. RNA polymerase-I
• B. RNA polymerase-II
• C. RNA polymerase-III
• D. All of the above

Answer 1

The correct option is D All of the above

In eukaryotes for the sake of division of labour, three RNA polymerases are present. Each of these is a DNA dependent RNA polymerase multi-subunit protein.
The individual RNA polymerases and their transcripts are:

RNA polymerase	Transcripts
RNA polymerase I	28S, 18S and 5.8S rRNA
RNA polymerase II	hnRNA (precursor of mRNA)
RNA polymerase III	tRNA, snRNA (small nuclear RNA), 5S rRNA