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

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Hershey and Chase $(1952)$

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(A) The unequivocal proof that $DNA$ is the genetic material came from the experiments conducted by Alfred Hershey and Martha Chase in $1952$. They worked with bacteriophages,which are viruses that infect bacteria. They grew some bacteriophages in a medium containing radioactive phosphorus $(^{32}P)$ to label the $DNA$,and others in a medium containing radioactive sulfur $(^{35}S)$ to label the proteins. When these labeled phages infected $E. coli$ bacteria,it was observed that only the radioactive phosphorus $(^{32}P)$ entered the bacterial cells,indicating that $DNA$,not protein,is the genetic material that enters the host to direct the production of new viral particles.

Which scientists' experiment provided the unequivocal proof that $DNA$ is the genetic material?

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