1. Two strands of DNA are held together as shown. The partial charge on each 2 a

Question

1. Two strands of DNA are held together as shown. The partial charge on each 2 and N atom is approximately 0.2e and 0.4e on each O atom. 0.2e represe of the charge of an electron, 1.6 x 1019C. The distance between ead h atom is 0.29 nm. a) Estimate the net force between a thymine and an adenine b) Estimate the net force between a guanine and a cytosine c) Assume a 50/50 mix and estimate the total force for a DNA molecule containing 3.2 billion base pairs O H-N H.O Deoxyribose N-H… Deoxyribose Guanine Cytosine Adenine Thymine

Explanation / Answer

a) The net force between thymine and adenine will be approximately 5x10-10 N

b) The net force between Guanine and Cytosine will be approximately 7x10-10 N

c) The total force for DNA molecule containing 3.2 billion base pairs is approximately 192x10-2 N  

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