<P> RNA splicing , in molecular biology , is a form of RNA processing in which a newly made precursor messenger RNA ( pre-mRNA ) transcript is transformed into a mature messenger RNA ( mRNA ) . During splicing , introns are removed and exons are joined together . For nuclear - encoded genes , splicing takes place within the nucleus either during or immediately after transcription . For those eukaryotic genes that contain introns , splicing is usually required in order to create an mRNA molecule that can be translated into protein . For many eukaryotic introns , splicing is carried out in a series of reactions which are catalyzed by the spliceosome , a complex of small nuclear ribonucleo proteins ( snRNPs ) . Self - splicing introns , or ribozymes capable of catalyzing their own excision from their parent RNA molecule , also exist . </P>
<P> RNA splicing , in molecular biology , is a form of RNA processing in which a newly made precursor messenger RNA ( pre-mRNA ) transcript is transformed into a mature messenger RNA ( mRNA ) . During splicing , introns are removed and exons are joined together . For nuclear - encoded genes , splicing takes place within the nucleus either during or immediately after transcription . For those eukaryotic genes that contain introns , splicing is usually required in order to create an mRNA molecule that can be translated into protein . For many eukaryotic introns , splicing is carried out in a series of reactions which are catalyzed by the spliceosome , a complex of small nuclear ribonucleo proteins ( snRNPs ) . Self - splicing introns , or ribozymes capable of catalyzing their own excision from their parent RNA molecule , also exist . </P>
the complex of protein and rna that carries out rna splicing is called a
the complex of protein and rna that carries out rna splicing is called a
spliceosome
spliceosome