AP Biology : DNA Scientists Flashcards

8329447567	Frederick Griffith	transformation of genetic material is possible through use of two pneumonia strains	0
8329447568	Oswald Avery	repeated Griffith's experiments to find that the transforming agent was DNA	1
8329447569	Hershey and Chase	used bacteriophages to isolate that the DNA from the phage transforms the bacterial host	2
8329447570	Erwin Chargaff	the 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 nucleotides	3
8329447571	Maurice Wilkins	operated a lab where X-ray crystallography was conducted to analyze molecules	4
8329447572	Rosalind Franklin	took the first X-ray picture of DNA	5
8329447573	Watson and Crick	proposed the double-helix model of DNA based on contributions of earlier scientist; proposed semi-conservative model of replication, but lacked supportive evidence	6
8329447574	Meselson and Stahl	used isotopes of nitrogen to demonstrate that DNA replication could not be conservative or dispersive; evidence that DNA replication is semi-conservative	7
8329460673	Linus Pauling	DNA strand model; triple helix idea was later disproven	8