ap biology dna history structure. nucleic acid structure
DESCRIPTION
Complimentary Base PairingTRANSCRIPT
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AP BIOLOGYDNA History & Structure
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Nucleic Acid Structure
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Complimentary Base Pairing
![Page 4: AP BIOLOGY DNA History Structure. Nucleic Acid Structure](https://reader036.vdocuments.us/reader036/viewer/2022062302/5a4d1b757f8b9ab0599b7060/html5/thumbnails/4.jpg)
Frederick Griffith
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FREDERICK GRIFFITH EXPERIMENT
Living S cells(control)
Living R cells(control)
Heat-killedS cells (control)
Mixture of heat-killedS cells and livingR cells
Mouse dies
Living S cellsare found in blood sample
Mouse healthy Mouse healthy Mouse dies
RESULTS
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Oswald Avery
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Avery and group identified the transforming substance was DNA. His colleagues were McCarty and MacLeod.
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Alfred Hershey & Martha Chase
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Bacteriophage injecting its DNA into a bacterial cell
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Electron Microscope View
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Hershey – Chase Experiment
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Erwin Chargaff
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CHARGAFF’S RULE
Adenine = Thymine (DNA) or Uracil (RNA)&Guanine = CytosineIf you know the % composition of 1, you can find the % composition of the other 3.
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Rosalind Franklin
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DNA from a top view
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DNA from a side view
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James Watson & Francis Crick with their DNA model
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See the HYDROGEN bonds?