Bacterial Cells Have Only One DNA Molecule, Which Is Double

question 22

Multiple Choice

Bacterial cells have only one DNA molecule, which is double stranded and is replicated in essentially the same f in eukaryotes. Imagine that, following the techniques of other scientists studying DNA, you created a bacterial ce contains only radioactive nitrogen in its DNA. You then place the cell in a culture medium containing only "regu (nonradioactive) nitrogen. Based on this scenario and your knowledge of DNA structure and replication, how many cells will contain some DNA with radioactive nitrogen after four rounds of cell replication?

• A) 8
• B) 1
• C) 4
• D) 2
• E) 16

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