 The type of RNA that carriers the genetic information/message from DNA and coveys it to ribosomes where the information is translated into amino acid sequences

 Introns – noncoding sequences “intervening” sequences; cut out of final mRNA  Exons – parts of the gene that are expressed as amino acids; “coding” or “expressed” sequences; splice together to form final mRNA

 Prior to exiting the nucleus a cap (single G nucleotide) is added to mRNA and a tail (chain of 50 to 250 adinine nucleuotides)  Cap and Tail serve to facilitate the movement of mRNA out of the nucleus AND to protect the coding sequence between the cap and tail