No it’s more like different programs can be turned on or off due to different stimuli. What’s remarkable is the 3d or 4d geometry of genome and mRNA has effect on the readability of the program. And epigenetics are the various molecular tags that can be added or removed from specific locations to effect this geometrical dynamics. Check out riboswitches to get an understanding of this. The shape that the code forms in 3 d controls the reading and output of the genome not only the code itself.