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Bsc Biotechnology student, graduating in 2015. This web log is for content relating to my degree and personal interests. Example topics such as biotechnology, molecular biology, genetically modified food debate, business and politics.
Meselson and Stahl confirmed the semi-conservative model of DNA replication. Using two different isotopic growth mediums they could determine the weight of the DNA by centrifuge. The lack of variance in DNA centrifuge migration when a light genome call was moved into a heavy medium dispelled the dispersive model. The intermediate centrifugal force dispelled the conservative model.
Hershey and Chase determined DNA to be the materiel responsible for heritable information using bacterophage by radio labeling the protein coats in one sample and the DNA of another. They could discern by centrifuge that is it only the DNA that enters the cell during infection.