dipity

Created by kenneyl24 on Nov 23, 2010

Last updated: 11/29/10 at 01:51 PM

• Francis Crick
  Apr 1953

  Francis Crick and James Watson wrote a paper stating that a DNA structure was helix.
  http://nobelprize.org/educational/medicine/dna_double_helix/readmore.html

• James Watson
  Apr 1953

  James Watson and Francis Crick wrote a paper that stated the structure of DNA was helix.
  http://nobelprize.org/educational/medicine/dna_double_helix/readmore.html

• Hershey and Chase
  1952

  Hershey and Chase discovered that DNA was the genetic material, and not the protein. Their experiments proved that DNA alone is the material of heredity.
  http://library.thinkquest.org/TQ0312650/hersheychase.htm

• Rosalind Franklin
  1951

  Rosalind Franklin helped decipher DNA using X-ray crystallography.
  http://www.suite101.com/article.cfm/biographies_scientists/96508

• Maurice Wilkins
  1950

  Maurice Wilkins took the first images of a DNA molecule.
  http://www.nndb.com/people/979/000030889/

• Erwin Chargaff
  1950

  Erwin Chargaff studied samples of DNA and discovered that the amount of adenine was almost equal to the amount of thymine, and that the amount of guanine was almost equal to the amount of cytosine. This is known as Chargaff's Rule.
  http://mooni.fccj.org/~ethall/dna/dna.htm

• Linus Pauling
  1948

  Linus Pauling determined that protein structures were helical.
  http://geneticstv.org/scientists/pauling.htm

• Oswald Avery
  1944

  Oswald Avery discovered DNA was the active agent in bacteria transofrmation. He named the discovery "Transforming Principle."
  http://www.geneticstv.org/scientists/avery.htm

• Fredrick Griffith
  1928

  Fredrick Griffith discovered the natural process of Transformation. He understood DNA was the molecule of inheritance.
  http://library.thinkquest.org/20830/Textbook/HistoryofDNAResearch.htm

• P.A. Levene
  Jul 1, 1920

  P.A. Levene discoverd DNA can be broken down into a sugar, a phosphate group, and four nitrogen-containing bases (adenine, guanine, thymine, and cytosine). Also a nucleotide contains one base, a sugar, and a phosphate group.
  http://www.sciencewithmrnoon.com/abiology/BI081NTS.HTM