The removal of sections of RNA, called introns, occur at RNA splicing stage step in eukaryotic cells
Exons and introns are both present in the pre-mRNA transcript. During the splicing procedure, the introns are eliminated. In this instance, there are two exons and one intron in the pre-mRNA. The 5′ and 3′ ends of introns contain these locations. The RNA sequence that is deleted most frequently has the dinucleotide GU at its 5′ end and the triphosphate AG at its 3′ end. Pre-mRNAs (RNA polymerase II-generated transcripts) in eukaryotic cells must undergo appropriate processing to become messenger RNA before being translated into protein products (mRNA). Pre-mRNA processing is made up of three main processes: 3′-end polyadenylation, splicing, and 5′-end capping.
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