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AP Biology : DNA Scientists Flashcards

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8329447567Frederick Griffithtransformation of genetic material is possible through use of two pneumonia strains0
8329447568Oswald Averyrepeated Griffith's experiments to find that the transforming agent was DNA1
8329447569Hershey and Chaseused bacteriophages to isolate that the DNA from the phage transforms the bacterial host2
8329447570Erwin Chargaffthe percentage of the 4 types of nucleotides is different in different organisms; percent of adenine nucleotides is the same as the percent of thymine nucleotides; percent of cytosine nucleotides is the same as percent of guanine nucleotides3
8329447571Maurice Wilkinsoperated a lab where X-ray crystallography was conducted to analyze molecules4
8329447572Rosalind Franklintook the first X-ray picture of DNA5
8329447573Watson and Crickproposed the double-helix model of DNA based on contributions of earlier scientist; proposed semi-conservative model of replication, but lacked supportive evidence6
8329447574Meselson and Stahlused isotopes of nitrogen to demonstrate that DNA replication could not be conservative or dispersive; evidence that DNA replication is semi-conservative7
8329460673Linus PaulingDNA strand model; triple helix idea was later disproven8
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