Q. To prove semiconservative mode of DNA replication, Meselson and Stahl grew bacteria in medium containing
A) ¹⁵N
B) radioactive N and p.
C) ³²P
D) ³⁵S
Explanation
Meselson and Stahl grew bacteria on medium containing ¹⁵NH₄Cl. ¹⁵N is the heavy isotope of nitrogen. By growing bacteria in the same medium for generations, ¹⁵N was incorporated into newly synthesized DNA.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.