What does the given figure represent?

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(B) The provided figure illustrates the process of transcription in eukaryotes,specifically highlighting post-transcriptional modifications.Key featur

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Process of transcription in eukaryotes

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(B) The provided figure illustrates the process of transcription in eukaryotes,specifically highlighting post-transcriptional modifications.Key features shown in the diagram include:$1$. Transcription of $DNA$ into primary transcript (pre-mRNA).$2$. Capping: Addition of a methyl guanosine triphosphate cap at the $5'$ end.$3$. Splicing: Removal of introns and joining of exons.$4$. Tailing (Polyadenylation): Addition of a poly-$A$ tail at the $3'$ end.These modifications are characteristic of eukaryotic gene expression,as prokaryotes do not undergo such extensive processing of mRNA.

Column-$I$	Column-$II$
$i$. Cistron	$a$. Addition of methylated $GTP$ to $5'$-end of $hnRNA$.
$ii$. Exon	$b$. Non-coding sequences which are removed by splicing.
$iii$. Intron	$c$. Segment of $DNA$ coding for a polypeptide.
$iv$. Capping	$d$. Coding sequences which appear in processed $mRNA$.

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