Biology - Chapter 16
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Biology - Chapter 16
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Free Flashcard From Biology - Chapter 16
Question:
E. coli cells grown
on 15N medium are transferred to 14N medium and allowed to grow for two more
generations (two rounds of DNA replication). DNA extracted from these cells is
centrifuged. What density distribution of DNA would you expect in this
experiment?
A) one high-density and one low-density band
B) one intermediate-density band
C) one high-density and one intermediate-density band
D) one low-density and one intermediate-density band
E) one low-density band
Answer:
D) one low-density and one intermediate-density band