The reason the amount of A = T and G = C ("Chargaff's Rule") is because X-ray diffraction indicated a double-helical pattern in DNA phosphates alternate with pentose sugars in the DNA backbone All other statements are correct explanations of Chargaff's Rule purines base-pair with pyrimidines DNA has polarity
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The rules formulated by Erwin Chargaff state that A = T and G = C in any sample of DNA. A = C = G = T in any sample of DNA. the base composition of DNA is completely variable. A = G and C = T in any sample of DNA. A = C and G = T in any sample of DNA. Franklin's X-ray crystallography data suggested that DNA follows Chargaff's rules. replicated conservatively. is the genetic material. has a helical structure. replicated semiconservatively. According to the Watson and Crick model for the structure of DNA, _____ are on the outside and _____ are on the inside of the double-stranded DNA molecule. The strands run _____. sugar-phosphate groups; nitrogenous bases; haphazardly sugar-phosphate groups; nitrogenous bases; antiparallel nitrogenous bases; sugar-phosphate groups; parallel nitrogenous bases; sugar-phosphate groups; haphazardly nitrogenous bases; sugar-phosphate groups; antiparallel The pairing of specific bases in the Watson and Crick structure of DNA is known as _____ base pairing. parallel conservative semiconservative antiparallel complementary
Shaiju T.
Erwin Chargaff's discovery that DNA contains equimolar amounts of guanine and cytosine and also equimolar amounts of adenine and thymine has come to be known as Chargaff's rule: G = C and A = T (a) Does Chargaff's rule imply that equal amounts of guanine and adenine are present in DNA? That is, does G = A? (b) Does Chargaff's rule imply that the sum of the purine residues equals the sum of the pyrimidine residues? That is, does A + G = C + T? (c) Does Chargaff's 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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