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Q.

Bacteriophage protein coat was labelled by growing E.coli on

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a

radioactive sulphur-35

b

radioactive sulphur-30

c

radioactive Phosphorus-32

d

radioactive sulphur-32

answer is A.

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Detailed Solution

The unequivocal proof that DNA is the genetic material came from the experiments of Alfred Hershey and Martha Chase .They grew some viruses on a medium that contained radioactive phosphorus and some others on medium that contained radioactive sulfur. Sulfur is a component of proteins, so bacteriophase protein coat was labelled (35S).

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