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A solution contains two strands of DNA, which coil roughly into spheres when in water. Strand 1 is twice as long as strand 2,

A solution contains two strands of DNA, which coil roughly into spheres when in water. Strand 1 is twice as long as strand 2, and is found to diffuse 1.5 times farther in a given time. What is the ratio of densities for the two DNA coils PA/ PB? . 0.18 . 0.59 . 4.5 D. 6.8 . 23

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