Question : To prove that DNA is the genetic material, which radioactive isotopes were used by Hershey and Chase (1952) in their experiments?

Question : To prove that DNA is the genetic material, which radioactiv

1.	Question : To prove that DNA is the genetic material, which radioactive isotopes were used by Hershey and Chase (1952) in their experiments?
Answer» `.^(35)S and .^15 N` `.^(32)p and .^35 S` `.^(32)p and .^15 N` `.^(14)N and .^15 N` Solution :Hershey and Chase experiment is BASED on the FACT that DNA contains PHOSPHORUS and similarly sulphur is present in proteins but not in DNA. They incorporated RADIOACTIVE isotope of phosphorus`(overset(32)P)` into phage DNA and that of sulphur `(overset(35) S)` into proteins of a separate phage culture. Viruses grown in the presence of radioactive proteinof radioactive phosphorus contained DNA contained radioactive DNA but not radioactive protein because DNA contains phosphorus but proteins do not . Similarly , viruses grown on radioactive sulphur CONTAIN radioactive protein but not radioactive DNA because DNA does not contain sulphur.