The two strands of the helix-shaped DNA molecule are held
Chapter 16, Problem 37(choose chapter or problem)
(III) The two strands of the helix-shaped DNA molecule are held together by electrostatic forces as shown in Fig. 16-39. Assume that the net average charge (due to electron sharing) indicated on H and N atoms has magnitude \(0.2 e\) and on the indicated C and O atoms is \(0.4 e\). Assume also that atoms on each molecule are separated by \(1.0 \times 10^{-10} \mathrm{~m}\). Estimate the net force between (a) a thymine and an adenine; and (b) a cytosine and a guanine. For each bond (red dots) consider only the three atoms in a line (two atoms on one molecule, one atom on the other). (c) Estimate the total force for a DNA molecule containing \(10^{5}\) pairs of such molecules. Assume half are A-T pairs and half are C-G pairs.
Equation Transcription:
Text Transcription:
0.2e
0.4e
1.0 times 10^-10 m
10^5
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