027 - DNA and RNA - Part 1 - Paul Andersen introduces the nucleic acids of life; RNA and DNA. He details the history of DNA from Griffith, to Avery, to Hershey and finally to Watson and Crick. He also details the difference between prokaryotic and eukaryotic chromosomes.

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All of the images are licensed under creative commons and public domain licensing:
ARS, Herb Pilcher, USDA. English:, November 1999. This image was released by the Agricultural Research Service, the research agency of the United States Department of Agriculture, with the ID K8664-1 (next). http://commons.wikimedia.org/wiki/File:Bt_plants.png.
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Erwin Chargaff, n.d. http://ihm.nlm.nih.gov/luna/servlet/detail/NLMNLM~1~1~101411939~171498:-Erwin-Chargaff-?embedded=tru....
"File:Alfred Hershey.jpg." Wikipedia, the Free Encyclopedia. Accessed November 24, 2013. http://en.wikipedia.org/wiki/File:Alfred_Hershey.jpg.
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"File:Griffithm.jpg." Wikipedia, the Free Encyclopedia, January 3, 2013. http://en.wikipedia.org/w/index.php?title=File:Griffithm.jpg&oldid=518398606.
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"File:James D Watson.jpg." Wikipedia, the Free Encyclopedia. Accessed November 24, 2013. http://en.wikipedia.org/wiki/File:James_D_Watson.jpg.
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"File:Martha Chase.jpg." Wikipedia, the Free Encyclopedia. Accessed November 24, 2013. http://en.wikipedia.org/wiki/File:Martha_Chase.jpg.
"File:Oswald T. Avery Portrait 1937.jpg." Wikipedia, the Free Encyclopedia. Accessed November 24, 2013. http://en.wikipedia.org/wiki/File:Oswald_T._Avery_portrait_1937.jpg.
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JrPol. Nederlands: Schematische Weergave Bacterie, February 1, 2009. Own work. http://commons.wikimedia.org/wiki/File:Bacteria-.svg.
Maurice Wilkings and Rosalind Franklin, n.d. http://www.nsummit.k12.ut.us/highschool_root/html/Teacherpages/Marsh/BioSite/Lessons/Standard4/3/Wil....

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