Question

Messelson and Stahl’s experiment carried out centrifugation in CsCl₂ density gradient to separate ______.

Options

• DNA from RNA

• DNA from protein

• RNA from protein

• Normal DNA from heavy DNA

Answer 1

Messelson and Stahl’s experiment carried out centrifugation in CsCl₂ density gradient to separate normal DNA from heavy DNA.

Explanation:

Meselson and Stahl used CsCl density-gradient centrifugation to separate DNA molecules of different buoyant densities, heavy (15N-labelled) DNA from light (14N) DNA, and thereby demonstrated semiconservative replication.