Question

In transcription in eukaryotes, heterogenous nuclear RNA (hn RNA) is transcribed by

• A. RNA polymerase I
• B. RNA polymerase II
• C. RNA polymerase III
• D. all of these

Answer 1

The correct option is B RNA polymerase II

Eukaryotes have three RNA polymerases. RNA polymerase I is located in the nucleolus and transcribes for RNAs (28S, 18S and 5.8S) whereas RNA polymerase II is localised in the nucleoplasm and used for hnRNA, mRNA and RNA polymerase Ill is localised in the nucleus, possibly the nucleolar-nucleoplasm interface and transcribes for tRNA, 5S, RNA and nRNAs.