Question

Meselson and Stahl cultured E.coli in a medium containing ${}^{15}N{H}_{4}Cl$ for several generations. As a result, the ${}^{15}N$ got incorporated into

• A. Nucleic acids
• B. Proteins
• C. Enzymes
• D. All the above

Answer 1

The correct option is D All the above

Meselson and Stahl worked together to prove that DNA replication is semiconservative. In their experiment, they cultured E.coli for many generations in a medium containing heavy nitrogen ${}^{15}N$. This resulted in the incorporation of ${}^{15}N$ into all the nitrogenous compounds in the bacterial cells such as the amino acids, proteins, nucleic acids, enzymes etc.