A culture of E. coli growing in a medium containing the normal, lighter isotope of nitrogen (14N) as the sole source of nitrogen is transferred to a medium containing the heavier isotope of nitrogen (15N) for 5 generations. What is the molar ratio (expressed as a decimal to the nearest thousandths) of the hybrid DNA (15N-14N) to heavy DNA (15N-15N) at this point? Hint: try to recognize the pattern represented by the above process to answer this question more efficiently.