Which one of the following processes occurs i | vedclass

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(A) In eukaryotic cells,protein synthesis involves several steps. $1$. Transcription occurs in the nucleus,where $DNA$ is transcribed into heterogeneo

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Processing of hnRNA

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(A) In eukaryotic cells,protein synthesis involves several steps. $1$. Transcription occurs in the nucleus,where $DNA$ is transcribed into heterogeneous nuclear $RNA$ $(hnRNA)$. $2$. The $hnRNA$ undergoes post-transcriptional modifications (processing) inside the nucleus,which include splicing (removal of introns and joining of exons),capping,and tailing (polyadenylation) to form mature $mRNA$. $3$. The mature $mRNA$ is then exported to the cytoplasm. $4$. Activation of amino acids,translation,and the formation of the polypeptide chain occur in the cytoplasm on ribosomes. Therefore,the processing of $hnRNA$ is the only process listed that occurs inside the nucleus.

Which one of the following processes occurs inside the nucleus during protein synthesis in eukaryotic cells?

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