E.coli was infected with bacteriophage having radioactive ( 
) protein in a culture. It was blended, centrifuged and distribution of 
determined. What does the experiment show?
Text Solution
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The unequivocal proof that DNA is the genetic material came from the experiments of Hershey and Chase. They worked with viruses that infect bacteria called bacteriophages.
According to experiment, bacteria which was infected with viruses that had radioactive DNA were radioactive, indicating that DNA was the material that passed from the virus to the bacteria. Bacteria that were infected with viruses that had radioactive proteins were not radioactive. This indicates that proteins did not enter the bacteria from the viruses. DNA is therefore the genetic material that is passed from virus to bacteria.
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