As we learn more, this is becoming increasingly, transparently obvious. Random errors can screw things up, and — in very rare circumstances — provide a survival advantage in a pathological environment.
The notion that random errors filtered by natural selection can account for all that is found in biological systems is a pathetically illogical, hopelessly improbable explanation for the information-processing machinery of the cell.
Chemistry is not the basis of life. Chemistry is the medium; information is the message.
On the subject of chemistry: The ID movement has thrown a satchel charge of trinitrotoluene into the Darwinian faux-edifice, and blown it to bits (pun intended).