Meselson and Stahl distinguished between parental and newly-synthesized DNA by using
A)heavy metal.
B)heavy and light forms of nitrogen.
C)nucleic acid dyes.
D)chromosome paints.

Question

Quizplus · Accepted Answer

Meselson and Stahl used heavy and light forms of nitrogen to distinguish parental and newly-synthesized DNA. They grew bacteria in a medium containing heavy 15N and then transferred them to a medium containing light 14N. The newly synthesized DNA contained only 14N and was distinguished from the parental DNA containing both 15N and 14N, allowing them to demonstrate semi-conservative replication of DNA.

Meselson and Stahl Distinguished Between Parental and Newly-Synthesized DNA by Using