A: Single DNA dependent DNA polymerase cataly | vedclass

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(D) In eukaryotes,there are three types of $RNA$ polymerases ($RNA$ polymerase $I$,$II$,and $III$) that transcribe different types of $RNA$. In bacter

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Both Assertion and Reason are incorrect.

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(D) In eukaryotes,there are three types of $RNA$ polymerases ($RNA$ polymerase $I$,$II$,and $III$) that transcribe different types of $RNA$. In bacteria (prokaryotes),a single $DNA$-dependent $RNA$ polymerase catalyses the transcription of all types of $RNA$ ($mRNA$,$tRNA$,and $rRNA$). Thus,the Assertion is incorrect because eukaryotes use multiple polymerases,not a single one.Structural genes in bacteria are polycistronic (a single promoter regulates multiple genes),whereas in eukaryotes,they are monocistronic. Thus,the Reason is also incorrect.

$A$: Single $DNA$ dependent $DNA$ polymerase catalyses transcription of all types of $RNA$ in all except bacteria.
$R$: Structural genes in bacteria are monocistronic.

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$A$: Single $DNA$ dependent $DNA$ polymerase catalyses transcription of all types of $RNA$ in all except bacteria.$R$: Structural genes in bacteria are monocistronic.