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Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYMolecular Basis of Inheritance3 Marks
Question
With respect to Messelson and Stahl’s Experiment, answer the following questions:
  1. Identify the method used to distinguish between heavy and light isotopes of nitrogen.
  2. With the help of diagrams, compare the results for the DNA isolated after 20 minutes of experiment with the DNA which was isolated after 40 minutes.
✓

Answer

  1. Centrifugation in a CsCl density gradient.
  2.  

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