Solved: Erwin Chargaffs discovery that DNA contains equimolar amounts of guanine and

Chapter 0, Problem 23-71

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Erwin Chargaffs discovery that DNA contains equimolar amounts of guanine and cytosine and also equimolar amounts of adenine and thymine has come to be known as Chargaffs rule: and (a) Does Chargaffs rule imply that equal amounts of guanine and adenine are present in DNA? That is, does (b) Does Chargaffs rule imply that the sum of the purine residues equals the sum of the pyrimidine residues? That is, does (c) Does Chargaffs rule apply only to double-stranded DNA, or would it also apply to each individual strand if the double helical strand were separated into its two complementary strands?

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