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(A) The unequivocal proof that $DNA$ is the genetic material came from the experiments of Alfred Hershey and Martha Chase in $1952$. They worked with

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Hershey and Chase

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(A) The unequivocal proof that $DNA$ is the genetic material came from the experiments of Alfred Hershey and Martha Chase in $1952$. They worked with bacteriophages,which are viruses that infect bacteria. By using radioactive isotopes ($^{32}P$ to label $DNA$ and $^{35}S$ to label proteins),they demonstrated that only $DNA$ entered the bacterial cell,while the protein coat remained outside. This confirmed that $DNA$ is the genetic material that carries hereditary information.

$DNA$ is the genetic material was proved by ...... .

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