The physical arrangement of the atoms on the molecule can be interpreted as a "code"....
Actually, the "genetic code" is a code for a very trivial reason: the word "code" is defined in such a way so as to include the genetic code.
The definition of "code" was so extended to include DNA because of the obvious analogy with pre-W&C uses of the word "code".
The problem is not with calling the genetic code a code; the problem is when people try to draw incorrect inferences based on mixing the different possible meanings of the word; like when IDists compare the genetic code to computer codes or to the use of symbols in language.
Q: If science doesn't know where this comes from, then couldn't it be God's doing?
A: The only difference between that kind of thinking and the stereotype of the savage who thinks the Great White Hunter is a God because he doesn't know how the hunter's cigarette lighter works is that the savage has an excuse for his ignorance. -- jhuger