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You are repeating the Hershey-Chase experiment and are provided with two isotopes: 32P and 15N (in place of 35S in the original experiment). How do you expect your results to be different?
Answers (1)
The facts that DNA contains phosphorus while protein contains sulphur supported the selection of phosphorus and sulphur. In this experiment, phosphorus was used as a marker for DNA and Sulphur was used as a marker for protein. By tracing the movement of sulphur and phosphorus; it was easier to trace the movement of DNA and protein through subsequent generations. But nitrogen is present in DNA as well as in protein. Hence, the use of 15N will not help in finding whether the DNA or protein is the genetic material.
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