RNA polymerase II in eukaryotes catalyzes transcription of which RNA species?

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Multiple Choice

RNA polymerase II in eukaryotes catalyzes transcription of which RNA species?

Explanation:
RNA polymerase II is the enzyme in eukaryotes that makes messenger RNA. While it can produce some noncoding RNAs, the classic role associated with this polymerase is transcribing the mRNA transcripts that will be processed into mature mRNA. In contrast, ribosomal RNA is made by RNA polymerase I and transfer RNA by RNA polymerase III. So the choice that identifies mRNA alone is the best fit because tRNA is not transcribed by RNA polymerase II.

RNA polymerase II is the enzyme in eukaryotes that makes messenger RNA. While it can produce some noncoding RNAs, the classic role associated with this polymerase is transcribing the mRNA transcripts that will be processed into mature mRNA. In contrast, ribosomal RNA is made by RNA polymerase I and transfer RNA by RNA polymerase III. So the choice that identifies mRNA alone is the best fit because tRNA is not transcribed by RNA polymerase II.

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