character: Francis Crick
topic: Double Helix Model of DNA
grade: 12
subject: Biology
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character: James Watson
topic: Discovery of DNA Structure
grade: 12
subject: Biology
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character: Rosalind Franklin
topic: X-ray Diffraction of DNA
grade: 12
subject: Biology
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character: Avery, MacLeod, and McCarty
topic: Transforming Principle in DNA Research
grade: 12
subject: Biology
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