 Any unstable system of potentially reactive molecules could potentially serve as a way of storing free energy , if the cell maintained their concentration far from the equilibrium point of the reaction . However , as is the case with most polymeric biomolecules , the breakdown of RNA , DNA , and ATP into simpler monomers is driven by both energy @-@ release and entropy @-@ increase considerations , in both standard concentrations , and also those concentrations encountered within the cell . 
