NEET Biology question

During Meselson and Stahl's experiments, heavy DNA was distinguished from normal DNA by centrifugation in

(A)CsOH gradient
(B)¹⁴NH₄Cl
(C)¹⁵NH₄Cl
(D)CsCl gradientCorrect

Answer: (D)

Solution

Bacteria were first grown in a medium with heavy nitrogen (¹⁵N) and then shifted to normal (¹⁴N) medium. DNA extracted at intervals was dissolved in caesium chloride (CsCl)

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Question ID VK-112197