So in prokaryotic cells what happens is we take the DNA of that prokaryotic cell and then we transcribe the mRNA molecule and then that mRNA molecule can be used directly to synthesize the protein or proteins. So the mRNA molecule in prokaryotic cells can sometimes code for more than one protein but in eukaryotic cells it's slightly different. In eukaryotic cells we take the DNA and then we produce a precursor mRNA a pre mRNA molecule. And before we can actually synthesize the proteins from that premRNA molecule we have to modify that pre mRNA molecule to produce the fully mature and functional mRNA molecule and only then can we actually synthesize the proteins. And unlike in prokaryotic cells in eukaryotic cells a distinct mRNA molecule is produced for every one of the genes that is found on the DNA molecule. And the messenger RNA molecule makes up about 5% of the total RNA composition found in our cell.