Which eukaryotic RNA polymerase is specifically responsible for the transcription of protein-coding genes into pre-mRNA?
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Correct answer: RNA polymerase II
RNA polymerase II transcribes all protein-coding genes to produce mRNA. It also transcribes some small nuclear RNAs (snRNAs) and microRNAs, distinguishing it from Polymerase I (rRNA) and III (tRNA).
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