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Escherichia Coli Bacteria Containing Only 15N-Labeled DNA Were Grown in Media

Question 195

Multiple Choice

Escherichia coli bacteria containing only 15N-labeled DNA were grown in media containing only 14N nucleotides.  What percentage of double helices would be composed of one 15N strand and one 14N strand after three generations?


A) 12.5%
B) 25%
C) 50%
D) 100%

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