The two sides of the DNA double helix are connected by pairs of bases (adenine,

Question

The two sides of the DNA double helix are connected by pairs of bases (adenine, thymine, cytosine, and guanine). Because of the geometric shape of these molecules, adenine bonds with thymine and cytosine bonds with guanine. The figure shows the thymine–adenine bond. Each charge shown is (+/-)e and the H-N distance is 0.110 nm.

A. Calculate the electric potential energy of the adenine–thymine bond, using combinations of molecules O-H-N and N-H-N.

B. Compare this energy with the potential energy of the proton–electron pair in the hydrogen atom. The electron in the hydrogen atom is 0.0529 nm from the proton.

The distance from O-H-N is .280nm and the distance from N-H-N is .300nm. H is (+) and N and O are (-)

Explanation / Answer

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