Question- A culture of E. coli growing in a medium containing a heavy isotope of nitrogen (15N) as the sole source of nitrogen is switched to a medium containing the normal, lighter isotope of nitrogen (14N) for 3 generations. What is the molar ratio of the hybrid DNA (15N-14N) to light DNA (14N-14N) at this point? Report your answer as a decimal to the nearest hundredths.
Please perform what you can as well as illustrate your work so I can follow. Thanks