MRna Splicing. Introducing: mRNA Splicing After being processing of the pre-mRNA is completed, the strand of mRNA is ready to be spliced. Splicing is the stage during which introns are removed from the strand, and the exons that remain are assembled into a finished strand of mRNA that is ready for translation. This section provides an animation and set of stills that cover the basic steps in mRNA splicing. Read more: http://vcell.ndsu.edu/animations/mrnasplicing/index.htm