How Many Polymerases Catalyze Transcription in Eukaryotes

Question

How many polymerases catalyze transcription in eukaryotes?
A) one
B) two
C) three
D) four

Accepted Answer

In eukaryotes, three different RNA polymerases (RNA polymerase I, II, and III) catalyze the transcription of different types of RNA. RNA polymerase I is responsible for transcribing ribosomal RNA (rRNA), RNA polymerase II transcribes messenger RNA (mRNA) and some small nuclear RNAs (snRNA), and RNA polymerase III transcribes transfer RNA (tRNA) and some other small RNAs.