Suppose you are provided with an actively dividing culture of E. coli bacteria to which radioactive thymine has been added. What would happen if a cell replicates once in the presence of this radioactive base?
A) all four bases of the DNA would be radioactive
B) DNA in both daughter cells would be radioactive
C) neither of the two daughter cells would be radioactive
D) one of the daughter cells, but not the other would be radioactive
Answer: B) DNA in both daughter cells would be radioactive
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Biology
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