Molecular Basis of Inheritance · Class 12 · CBSE · Science Biology

In the Meselson and Stahl experiment, ^{15}N was incorporated into E. coli DNA by growing them for many generations in a medium containing:

Practice question from Molecular Basis of Inheritance (Class 12 · CBSE · Science Biology), with the correct answer and a step-by-step solution.

medium · MCQ · Q-EF56D6

In the Meselson and Stahl experiment, 15N^{15}N was incorporated into E. coli DNA by growing them for many generations in a medium containing:

  1. A.15NH4Cl^{15}NH_4ClCorrect answer
  2. B.Na15NO3Na^{15}NO_3
  3. C.15N2^{15}N_2 gas
  4. D.Choline-15N^{15}N

Solution

Meselson and Stahl used 15NH4Cl^{15}NH_4Cl (ammonium chloride, where 15N^{15}N is the heavy isotope of nitrogen) as the heavy source of nitrogen to distinguish newly synthesized DNA strands in replication.

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