Suppose You Are Provided with an Actively Dividing Culture of E

question 44

Multiple Choice

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) One of the daughter cells, but not the other, would have radioactive DNA.
• B) Neither of the two daughter cells would be radioactive.
• C) All four bases of the DNA would be radioactive.
• D) Radioactive thymine would pair with nonradioactive guanine.
• E) DNA in both daughter cells would be radioactive.

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