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You and your lab partner decide to repeat the Hershey and Chase experiment, with modifications. You...

You and your lab partner decide to repeat the Hershey and Chase experiment, with modifications. You decide to use radioactive oxygen for the DNA and radioactive nitrogen for the protein. For batch 1 (protein) you will find radioactivity in the ______________; for batch 2 (DNA) you will find radioactivity in the _________

a)pellet only; pellet and supernatant

b)pellet and supernatant; pellet and supernatant

c)supernatant only; pellet only

d)pellet only; supernatant only

e) pellet and supernatant; supernatant

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Answer #1

c.supernatant only; pellet only

In this experiment, the lack of radiolabeled DNA remaining in the solution after the bacteriophages had been allowed to adsorb to the bacteria showed that the phage DNA was transferred into the bacterial cell. The presence of almost all the radioactive protein in the solution showed that the protein coat that protects the DNA before adsorption stayed outside the cell. This formed the basis of Hershey-chase experiment.

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