Genetics WSU MBIOSBIOL 301, Exam 1, Dr. Julie Stanton, Spring Fall Newest Solution
Genetic material was first hypothesized to be what? Why? - ANS ✔✔ - Protein because DNA seemed to be too simple to contain all of the necessary genetic information What 3 key experiment lead to the discovery that DNA was genetic material? - ANS ✔✔ - Griffith experiment, Avery, Hershey-Chase. Describe the Griffith Experiment. - ANS ✔✔ - Griffith used two strands of Dipolococcus pnemoniae, IIIS (virulent) and IIR(non-virulent). When a mouse was injected with heat-killed IIIS, the mouse lived. When the mouse was injected with both, it died. Conclusion: Something in the heat-killed IIIS transformed the IIR into virulent bacteria. Describe the Avery Experiment. - ANS ✔✔ - The IIIS bacteria was heat-killed in a test tube after being centrifuged. Then the carbohydrate, lipid, and protein medium was removed. Some of the heat-killed IIIS bacteria were added to a solution containing IIR bacteria. This was repeated, but adding either protease, RNase, or DNase. A transformation of the IIR cells
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