Question about Meselson-Stahl and replication

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monk
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Question about Meselson-Stahl and replication

Post by monk » Thu Apr 06, 2006 9:15 pm

I have two questions, would anyone please help me out. They're from my quizz, but I have no idea 'bout that.

1. If the Meselson-Stahl experiment had shown that disruptive replication was the correct method of replication, what nitrogen (heavy and light) patterns would have shown up in their test tubes after one generation, two generations and three generations of bacterial growth. Use drawings and explanations in your answer.

2. During the investigation of the new organism from Mars, you find several things interesting about the replication of its DNA. First there are no Okazaki fragments in the DNA anywhere. Second, there are telomeres, but they are shortened on only one end of the linear chromosome. Using your knowledge of eukaryotic replication on earth, propose a model that would explain the two differences in the replication of the DNA from the Mars organisms.

Thanks in advance.

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