What was the nitrogen source used in the experiments performed by Meselson and Stahl?

What was the nitrogen source used in the experiments performed by Meselson and Stahl?
  1. 14NH₄Cl
  2. 15NH₄Cl
  3. 16NH₄Cl
  4. 18NH₄Cl

Solution

Meselson and Stahl grew E. coli in a medium containing 15NH₄Cl as the only nitrogen source.

Asked in: NCERT

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