Now take DNA. Me, the frog, the monkey, rats – we’re all made out of pretty much the same molecules. Carbon, Oxygen, etc. etc. Now if these molecules are “dead” we know exactly how they will come together. You can go sit in an organic chemistry class, and use software packages to look at various combinations of molecules and use the atomic potentials to see the structures which evolve under various temperatures and pressures.
There is something very different which happens if you look at something that is alive though. The way these molecules combine together when they are in a living organism is totally different than the way they combine when they are dead. It’s the same molecules – same potentials - same atoms - totally different animals/DNA/structures.
Dead stuff: same molecules / same T,P = same crystalline structures.
Alive stuff: same molecules, T, P = completely different crystalline structures.
What is the driving force / interaction potentials / bonding physics / etc. etc. which differs between the living and the deceased?
In metallurgical and materials engineering, molecules don’t just “randomly” come together, they don’t just “randomly” break apart, they don’t just decide one day to change their crystalline structure. The Iron of yesterday is the same as the iron of today - iron molecules have not "evolved" over the years to form new metalic structures.