What was the source of radioactivity in Hershey and Chase's experiments?

What was the source of radioactivity in Hershey and Chase's experiments?
  1. Proteins
  2. RNA
  3. Phosphorus and sulfur
  4. Bacteria

Solution

Hershey and Chase grew some viruses on a medium that contained radioactive phosphorus and some others on medium that contained radioactive sulfur.

Asked in: NCERT

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