Biology, 18.09.2019 09:30, vegetavigitop4l0r0

Meselson and stahl cultured
e. coli for several generations in a medium with a heavy isotope of nitrogen, 15n. they transferred the bacteria to a medium with a light isotope of nitrogen, 14 n. after two rounds of dna replication, half the dna molecules were light (both strands had 14n and half were hybrids (15n-14n. what did the researchers conclude from these results?

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Meselson and stahl cultured
e. coli for several generations in a medium with a heavy isotope o...