Once a mature mRNA transcript is made it is transported to the cytoplasm for translation into protein. … The stretches of DNA that do code for amino acids in the protein are called exons. During the process of splicing, introns are removed from the pre-mRNA by the spliceosome and exons are spliced back together.
What happens if an exon is spliced?
Splicing makes genes more “modular,” allowing new combinations of exons to be created during evolution. Furthermore, new exons can be inserted into old introns, creating new proteins without disrupting the function of the old gene.
Does mRNA remove exons?
The process of removing the introns and rejoining the coding sections or exons, of the mRNA, is called splicing. Once the mRNA has been capped, spliced and had a polyA tail added, it is sent from the nucleus into the cytoplasm for translation.