A molecule of DNA (deoxyribonucleic acid) is 2.31 µm long. The ends of the molecule become singly ionized: negative on...

A molecule of DNA (deoxyribonucleic acid) is 2.31 µm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 1.02% upon becoming charged, and remains in this equilibrium position. Determine the effective spring constant of the molecule.