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Problem: In their experiments directed at determining whether DNA or protein serves as genetic material, Hershey and Chase chose isotopes of sulfur and phosphorus to label protein and DNA molecules, respectively. Could they have utilized isotopes of carbon and nitrogen instead? If not, briefly explain.

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Remember that the experiment of Hershey and Chase aimed to show which is the genetic material of the phage. They used sulfur to tag proteins because it is present in the cysteine and methionine of proteins while DNA does not contain sulfur. 

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In their experiments directed at determining whether DNA or protein serves as genetic material, Hershey and Chase chose isotopes of sulfur and phosphorus to label protein and DNA molecules, respectively. Could they have utilized isotopes of carbon and nitrogen instead? If not, briefly explain.

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