The question is misleading because computation is not an objective phenomenon in nature (save in the minds of observers). You can interpret natural phenomena co

The question is misleading because computation is not an objective phenomenon in nature (save in the minds of observers). You can interpret natural phenomena computationally, sure, and there may well be a way to do this with DNA (in fact, some have done that). But there's no computation "out there". Even the computer in front of you isn't objectively computing. It behaves in a way that corresponds with a computational interpretation, but nothing going on inside of it is a computation operation per se.