Biology · Molecular Basis of Inheritance
Given below are two statements marked as Assertion (A) and Reason (R): Testbook Assertion (A): In the Meselson and Stahl experiment, DNA labeled with the heavy nitrogen isotope (15N) formed a band in a higher density region during centrifugation compared to DNA containing normal 14N. Testbook Reason (R): Nitrogen-15 (15N) is a radioactive isotope that is heavier than normal nitrogen because it contains an extra electron. Testbook Select the correct option:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Both (A) and (R) are true and (R) is the correct explanation of (A).
- 2Both (A) and (R) are true but (R) is not the correct explanation of (A).
- 3(A) is true but (R) is false.✓
- 4(A) is false but (R) is true.
Correct answer
(A) is true but (R) is false.
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