Two Circular DNAs Are Isolated, Both with 1000 Bp

question 69

Multiple Choice

Two circular DNAs are isolated, both with 1000 bp. One is supercoiled; the other is not. The two DNAs are placed in an ultracentrifuge.

• A) The supercoiled DNA should sediment faster.
• B) The nonsupercoiled DNA should sediment faster.
• C) They should sediment at the same rate.
• D) The information provided is not enough to determine which will sediment faster.

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