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The virus infected bacterium which contains radioactive proteins are not radioactive.

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in Biology – Class 12 by (271k points)
The virus infected bacterium which contains radioactive proteins are not radioactive.

(a) True

(b) False

This question was addressed to me by my school teacher while I was bunking the class.

This intriguing question comes from The Genetic Material is DNA topic in chapter Molecular Basis of Inheritance of Biology – Class 12

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Correct answer is (a) True

For explanation: The virus infected bacterium which contains the radioactive DNA, were observed to be radioactive in lab experiments. But this was not the case for the ones that had the radioactive protein in them. From this, it could be inferred that the protein molecules did not enter the bacterium but only DNA molecules did. The genetic material that is passed on from the virus to bacterium is the DNA.

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