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Question

In Hershey and chase experiment, if radioactive phosphorus and radioactive sulphur is used simultaneously in culturing viruses and allowed those to infect E.coli then


A

All the viral particles resulting from infection show radioactive phosphorus and sulphur

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B

only the DNA molecules of viral progeny show radioactivity

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C

only protein coat is radioactive

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D

some viral particles show radioactive DNA and some with radioactive protein coat

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Solution

The correct option is B

only the DNA molecules of viral progeny show radioactivity


only the DNA molecules of viral progeny show radioactivity as DNA is the genetic material and it is incorporated into bacteria.


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