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RNA polymerases in eukaryotes show divis...

RNA polymerases in eukaryotes show division of labour. Substantiate.

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In eukaryotes, there are at least three RNA polymerases in the nucleus with a clear cut division of labour.
(a) RNA polymerase I transcribes rRNAs
(b) RNA polymerase II transcribes the precursor of mRNA (i.e., hnRNA)
(c) RNA polymerase III catalyses transcription of tRNA
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