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In Miescher's experiments, he took bandages from a nearby clinic that had infected pus on it, he washed the pus, extracted a substance called "nuclein." Miescher believed it to compose of oxygen, hydrogen, nitrogen, and phosphorus.
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In Griffith's study, he found that bacteria can transfer their genetic code through a process called "Transformation." He experimented with a strain of the pneumonia bacteria. He found that the "rough" strain and the heat-killed smooth strain did not kill the host, yet the smooth and rough and heat-killed smooth strain did.
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Avery was best known for isolating DNA as the materials that make up genes and chromosomes.
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Chargaff discovered that there was the nearly the same amount of guanine and cytosine, and the nearly the same number of adenine and thymine molecules in DNAand this would help lead to the discovery of the double helix structre
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