phosphate group and one of the nitrogen bases (A, T, G, and C). All of their parts are joint in the same way. T and C are pyrimidines (single ring structure) and A and G are purines (which are larger, bulkier molecules, double ring structure). Rosalind Franklin had obtained especially good x- ray diffraction images of DNA fibers. By this process, a beam of x-rays is directed at a molecule. The molecule scatters the beam in patterns that can be captured on film. The pattern itself consists only of dots…
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