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/Fil....
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