BioHackersNetDNA. Deoxyribo NucleicAcid
A spool of mag tape inside each cell carrying a computer program designed to be run and edited but not read. One of the NucleicAcid
Our job is to read it 
DNA molecule's stability comes from DoubleHelix structure.
See also
I explain it to my little woman like this: DNA molecules are very flat (meaning stable, so they always roll up the same way). But inside the molecules are sub-molecules that have a very small magnetic* differences. If the DNA splits down the middle, those four sub-molecules will attract their opposites, so the two half-strands can become two complete strands with the same sequence of base pairs in each one.
The first requirement of a computer program is you can copy it.
Then, if you split the DNA, make a copy, split the copy, take it out of the Nucleus into a Ribosome, this will then read each set of 3 base pairs, and depending on what "word" they say in their little language, will pick one of ~20 AminoAcid's to bond together. So a strand of 60 base pairs will form a strand of 20 peptides.
But peptides are >not< flat. Each one has a different shape and different magnetic properties. So when they curl up to form a protein, different strands don't curl up the same way. They form a 3-dimensional blob, almost always the same shape for a given sequence. And this shape will have different magnetic properties on its surface.
This is how the words hidden in DNA encode structures with functions.
*I know it's not really magnetism...
Start: ProteinFoldingProblem.