A: All types of RNA are synthesized by DNA.R: | vedclass

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(B) Assertion $(A)$ is true because $DNA$ acts as a template for the transcription of all three major types of $RNA$ ($mRNA$,$tRNA$,and $rRNA$) in the

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$A$ and $R$ are both true,but $R$ is not the correct explanation of $A$.

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(B) Assertion $(A)$ is true because $DNA$ acts as a template for the transcription of all three major types of $RNA$ ($mRNA$,$tRNA$,and $rRNA$) in the cell.Reason $(R)$ is also true because $mRNA$ provides the genetic code,$tRNA$ brings amino acids to the ribosome,and $rRNA$ forms the structural and catalytic components of the ribosome,all of which are essential for protein synthesis.However,the reason $(R)$ explains the functional importance of $RNA$ types,not the mechanism of their synthesis by $DNA$. Therefore,$R$ is not the correct explanation of $A$.

$A$: All types of $RNA$ are synthesized by $DNA$.
$R$: All three types of $RNA$ are important in protein synthesis.

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$A$: All types of $RNA$ are synthesized by $DNA$.$R$: All three types of $RNA$ are important in protein synthesis.