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On which medium were the viruses cultivated by Alfred Hershey and Martha Chase?

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in Biology – Class 12 by (271k points)
On which medium were the viruses cultivated by Alfred Hershey and Martha Chase?

(a) A medium containing radioactive potassium (K)

(b) A medium containing radioactive Uranium (U)

(c) A medium containing radioactive phosphorous (P)

(d) A medium containing potassium (K)

I have been asked this question by my college director while I was bunking the class.

My question is based upon The Genetic Material is DNA in portion Molecular Basis of Inheritance of Biology – Class 12

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Correct answer is (c) A medium containing radioactive phosphorous (P)

For explanation: Alfred Hershey and Martha Chase wanted to figure out whether it was the protein from the bacteriophage that was entering into the bacteria or if it was the DNA. So, they cultured the bacteriophage in a medium containing radioactive phosphorous. In this medium they observed that the radioactive DNA was present in the virus but not the radioactive protein. This is because, protein doesn’t contain phosphorous but on the contrary, the DNA does.

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