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- What are the 3 R's in animal experiments? Explain each.Describe meselon AND STAHL'S EXPERIMENT?When the Oxford team of Ernst Chain and Nor- man Heatley had laboriously collected their first two grams of penicillin (probably no more than 2% pure!), Chain injected two normal mice with 1 g each of this preparation, and waited to see what would happen. The mice survived with no apparent ill effects. Their boss, Howard Florey, was furious at what he saw as a waste of good antibiotic. Why was this experiment important?
- State the questions that these classic experiments addressed: Griffith’s transformation experiment, Avery’s contribution to Griffith’s work, and the Hershey–Chase experiments.Why is the davson Danielli model wrong?What are the Chargaff rules? Describe the relationship between Chargaff and Watson and Crick.