First slide

Replication

Question

In Meselson and Stahl experiment, ¹⁵N can only be differentiated on the basis of

Easy

A

radioactivity
B

radioactive
C

physical observation
D

density gradient

Solution

Heavy DNA molecule could be distinguished from the normal DNA by centrifugation in a cesium chloride (CsCl) density gradient, ¹⁵N is not a radioactive isotope, and it can be separated from ¹⁴N only based on densities.

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