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Biology, 29.06.2019 04:30 gchippewa81
Renowned chemist linus pauling proposed a triple-helix structure for the dna molecule shortly before james watson and francis crick developed their double-helix model. in pauling's model, three polynucleotide strands lined up with their sugar-phosphate backbones oriented together in the middle of the helix. when watson and crick saw pauling's model, they knew that it could not be correct. they realized that pauling had not made use of a key piece of evidence about dna that had been discovered by earlier investigations. what key piece of evidence did watson and crick apply to their model that pauling did not apply to his? a. hershey and chase's identification of dna as the carrier of heritable information b. chargaff's finding that at and gc ratios are constant across phyla c. griffith's finding that a nonliving substance could transform living cells d. levene's identification of the chemical structure of nucleotides
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Renowned chemist linus pauling proposed a triple-helix structure for the dna molecule shortly before...
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