Friedrich Miescher
extracted a substance he called nuclein from white blood cells
Frederick Griffith
demonstrated that DNA was the genetic material by injecting smooth virulent bacteria and rough bacteria into mice
Hershey and Chase
proved that DNA was the genetic material, not protein
Erwin Chargaff
used relative proportions of bases in DNA to come up with his rules for base pairing
purine
the __________ bases include adenine and guanine
pyrimidine
the __________ bases include thymine and cytosine
Rosalind Franklin
"photographed" DNA and discovered it is 3 dimensional
Linus Pauling
proposed an incorrect 3 stranded DNA structure
Watson and Crick
solved the DNA structure
