O valence electron number is the answer
I'm pretty sure since one chemical can only bind with one other type, um, I think that one side of the DNA helicase helps make the other side?
No, why? Cause if you're winding up the clock it's basically doing what it needs to do. So there's no need for batteries.. I hope my sad sentence make sense :p
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Do you have a picture of this?
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Accuracy is the closeness to the specific target and precision is the closeness of the measurements to each other.