Which of the following are the post-transcrip | vedclass

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(B) In eukaryotic cells,the primary transcript (hnRNA) undergoes several post-transcriptional modifications before it is exported to the cytoplasm as

Vedclass · Accepted Answer

$B, C, D$ only

Vedclass · Answer

(B) In eukaryotic cells,the primary transcript (hnRNA) undergoes several post-transcriptional modifications before it is exported to the cytoplasm as mature mRNA.$1$. Splicing: The non-coding introns are removed,and the coding exons are joined together $(B)$.$2$. Capping: $A$ methyl guanosine triphosphate is added to the $5$' end of the hnRNA $(C)$.$3$. Tailing (Polyadenylation): Adenylate residues are added at the $3$' end of the hnRNA $(D)$.Transport of pre-mRNA to the cytoplasm occurs only after these processing steps are completed,not prior to splicing ($A$ is incorrect).Base pairing of complementary RNAs is not a standard post-transcriptional processing event for mRNA maturation ($E$ is incorrect).Therefore,the correct events are $B, C,$ and $D$.

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