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During **transcription** in eukaryotes, m-RNA is transcribed by:
ARNA polymerase I
BRNA polymerase II
CRNA polymerase III
DDNA polymerase α
Answer & Solution
Correct answer: B. RNA polymerase II
RNA polymerase I → rRNA; RNA polymerase II → mRNA (and hnRNA, the primary transcript); RNA polymerase III → tRNA and snRNA. Prokaryotes have only one RNA polymerase that does all three.
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