A : RNA polymerase is of three types in eukar | vedclass

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Question

(C) In eukaryotes, there are three distinct types of $RNA$ polymerases: $RNA$ polymerase $I$ (transcribes $rRNAs$), $RNA$ polymerase $II$ (transcribes

Vedclass · Accepted Answer

Assertion is correct, but Reason is incorrect.

Vedclass · Answer

(C) In eukaryotes, there are three distinct types of $RNA$ polymerases: $RNA$ polymerase $I$ (transcribes $rRNAs$), $RNA$ polymerase $II$ (transcribes $mRNA$ precursor), and $RNA$ polymerase $III$ (transcribes $tRNA$, $5s$ $rRNA$, and $snRNAs$). Thus, the Assertion is correct.Regarding the Reason, $RNA$ polymerase in prokaryotes (specifically the holoenzyme) consists of a core enzyme $(\alpha_2 \beta \beta' \omega)$ and a sigma $(\sigma)$ factor. The rho $(\rho)$ factor is a separate protein involved in the termination of transcription in prokaryotes, not a structural component of the $RNA$ polymerase enzyme itself. Therefore, the Reason is incorrect.

Direction of $RNA$ synthesis	Direction of reading of the template $DNA$
$A$. $5'-3'$	$3'-5'$
$B$. $3'-5'$	$5'-3'$
$C$. $5'-3'$	$5'-3'$
$D$. $3'-5'$	$3'-5'$

$(a) \; RNA$ polymerase $I$	$(i) \; tRNA$
$(b) \; RNA$ polymerase $II$	$(ii) \; rRNA$
$(c) \; RNA$ polymerase $III$	$(iii) \; hnRNA$

$A$ : $RNA$ polymerase is of three types in eukaryotes for the synthesis of all types of $RNAs$.
$R$ : $RNA$ polymerase consists of six types of polypeptides along with rho factor which is involved in termination of $RNA$ synthesis.

Similar Questions

During transcription,if the nucleotide sequence of the $DNA$ strand that is being coded is $ATACG$,then the nucleotide sequence in the $mRNA$ would be:

Transcription:

Select the correct option regarding the direction of $RNA$ synthesis and the direction of reading of the template $DNA$ strand.
Direction of $RNA$ synthesis Direction of reading of the template $DNA$
$A$. $5'-3'$ $3'-5'$
$B$. $3'-5'$ $5'-3'$
$C$. $5'-3'$ $5'-3'$
$D$. $3'-5'$ $3'-5'$

Match the following $RNA$ polymerase enzymes with their transcribed products:
$(a) \; RNA$ polymerase $I$ $(i) \; tRNA$
$(b) \; RNA$ polymerase $II$ $(ii) \; rRNA$
$(c) \; RNA$ polymerase $III$ $(iii) \; hnRNA$

Select the correct option from the following:

Transcription is defined as.........

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$A$ : $RNA$ polymerase is of three types in eukaryotes for the synthesis of all types of $RNAs$.$R$ : $RNA$ polymerase consists of six types of polypeptides along with rho factor which is involved in termination of $RNA$ synthesis.