In the Meselson-Stahl Experiment, the Conservative Model of DNA Replication

question 140

Multiple Choice

In the Meselson-Stahl experiment, the conservative model of DNA replication was ruled out by which of the following observations?

• A) No completely "heavy" DNA was observed after the first round of replication.
• B) No completely "light" DNA ever appeared, even after several replications.
• C) The product that accumulated after two rounds of replication was completely "heavy."
• D) Completely "heavy" DNA was observed throughout the experiment.
• E) Three different DNA densities were observed after a single round of replication.

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