Watson and Crick

Watson and Crick
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  • Kayenta Frye
  • James Watson and Francis Crick 
  • http://www.history.com/this-day-in- history/watson-and-crick-discover-chemical-structure-of-dna https://www.nature.com/scitable/topicpage/discovery-of- dna-structure-and-function-watson-397
  • Hey Crick have you seen Linus Pauling's model of DNA structure?
  • Yes, it is incorrect.  Let's beat him at his own game.
  • Let's use cardboard cut outs to represent the individual chemical components.
  • Linus Pauling thought he had figured out the correct model of DNA structure.
  • Yes, that way they will all fit together like a puzzle.
  • And I am Francis Crick!
  • Hypothesis: The structure of DNA  Independent Variable: Control: Experimental Group:
  • These aren't fitting correctly. Let's use Jerry Donohue's suggestion.
  • Linus Pauling thought he had figured out the correct model of DNA structure.
  • There we go! Now the complementary bases fit together using hydrogen bonds!
  • And I am Francis Crick!
  • Click to Edit Description
  • The structure of DNA is a double helix polymer!!
  • Linus Pauling thought he had figured out the correct model of DNA structure.
  • Yes! It's a spiral of 2 strands and each have a long chain of monomer nucleotides twisted around each other!
  • And I am Francis Crick!
  • Click to Edit Description
  • Crick, it seems that DNA replicates itself by individual strands.
  • Linus Pauling thought he had figured out the correct model of DNA structure.
  • And because of that, each strand becomes a new template for a new double helix.
  • And I am Francis Crick!
  • Click to Edit Description
  • Click to Edit Description
  • February 28, 1953
  • Click to Edit Description
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