If there are 81 million bases in the RNA of a | vedclass

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(B) The term $cDNA$ stands for complementary $DNA$,which is synthesized from mature $mRNA$ using the enzyme reverse transcriptase.Mature $mRNA$ has al

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(B) The term $cDNA$ stands for complementary $DNA$,which is synthesized from mature $mRNA$ using the enzyme reverse transcriptase.Mature $mRNA$ has already undergone the process of splicing,during which all non-coding sequences known as introns are removed.Since $cDNA$ is synthesized from this processed $mRNA$ template,it contains only exons and lacks any introns.Therefore,the number of introns present in $cDNA$ is $0$.

Column-$I$ (Enzyme)	Column-$II$ (Product)
$P$. $RNA$ polymerase-$I$	$I$. $rRNA$ $(18S, 28S, 5.8S)$
$Q$. $RNA$ polymerase-$II$	$II$. $tRNA, 5S rRNA, snRNAs$
$R$. $RNA$ polymerase-$III$	$III$. $hnRNA$

If there are $81$ million bases in the $RNA$ of a human cell,calculate the total number of introns present in $cDNA$.

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Match the following columns:
Column-$I$ (Enzyme) Column-$II$ (Product)
$P$. $RNA$ polymerase-$I$ $I$. $rRNA$ $(18S, 28S, 5.8S)$
$Q$. $RNA$ polymerase-$II$ $II$. $tRNA, 5S rRNA, snRNAs$
$R$. $RNA$ polymerase-$III$ $III$. $hnRNA$

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