RNA splicing is a process that occurs in cells after DNA is transcribed into pre-mRNA. During splicing, non-coding regions called introns are removed, and the remaining coding regions, known as exons, are joined together. This results in a mature mRNA molecule that can be translated into a protein. The splicing process is facilitated by a complex called the spliceosome, which recognizes specific sequences at the boundaries of introns and exons. Proper splicing is crucial for gene expression, as it ensures that the correct protein is produced, influencing various cellular functions and overall organism health.