RNA polymerases I, II, and III
In eukaryotes, which enzyme transcribes protein-coding genes into mRNA?
Answer D: explanation for every choice
A
RNA polymerase I transcribes most rRNA, in the nucleolus.
B
RNA polymerase III transcribes tRNA and 5S rRNA.
C
Primase makes RNA primers for DNA replication.
D
Correct. RNA polymerase II transcribes mRNA, along with most snRNAs and miRNAs.
TakeawayPol I: rRNA. Pol II: mRNA. Pol III: tRNA.
Next question →
Reviewed 2026-11-05 by a medical student. Spot an error? Report it with question ID bb52.