This removes its introns -- non-coding sections of the pre-mRNA .
In eukaryotic cells , once precursor mRNA ( pre-mRNA ) has been transcribed from DNA , it is processed to mature mRNA .
This removes DNA 's introns -- non-coding sections of the pre-mRNA .
In eukaryotic cells , once precursor mRNA ( pre-mRNA ) has been transcribed from DNA , it is processed to mature mRNA .