You Learn That a Mars Lander Has Retrieved a Bacterial

question 44

Multiple Choice

You learn that a Mars lander has retrieved a bacterial sample from the polar ice caps.To determine how the Mars bacteria replicate their DNA, you obtain a sample of these bacteria and perform the same kind of experiment that Meselson and Stahl did.Based on the following equilibrium density gradient centrifugation results, what type of replication would you propose for these new bacteria?

• A)Conservative
• B)Semiconservative
• C)Dispersive
• D)Semiconservative or dispersive
• E)Conservative or dispersive

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