Answer the following questions based on Meselson and Stahl‘s experim

1.	Answer the following questions based on Meselson and Stahl‘s experiment. I) Write the name of the chemical substance used as a source of nitrogen in the experiment by them? II) Why dis the scientists synthesize the light and the heavy DNA molecules in the organism used in the experiment ? III) How did the scientists make it possible to distinguish the heavy DNA molecule from the light DNA molecule? Explain.
Answer» I) NH₄Cl II). To check if DNA replication was semi conservative III. The heavy and light DNA molecule are distinguished by centrifugation in a Cesium chloride density gradient.

Answer the following questions based on Meselson and Stahl‘s experiment. I) Write the name of the chemical substance used as a source of nitrogen in the experiment by them? II) Why dis the scientists synthesize the light and the heavy DNA molecules in the organism used in the experiment ? III) How did the scientists make it possible to distinguish the heavy DNA molecule from the light DNA molecule? Explain.

Answer»

I) NH₄Cl

II). To check if DNA replication was semi conservative

III. The heavy and light DNA molecule are distinguished by centrifugation in a Cesium chloride density gradient.

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