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Question

Meselson and Stahl cultured E.coli in a medium containing 15NH4Cl for several generations. As a result, the 15N got incorporated into

A
Nucleic acids
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B
Proteins
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C
Enzymes
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D
All the above
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Solution

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 15N. This resulted in the incorporation of 15N into all the nitrogenous compounds in the bacterial cells such as the amino acids, proteins, nucleic acids, enzymes etc.

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