Nucleic Acids and the Genetic Material Problem Set 1

Problem 2: N-14 distribution after one generation

Correct!

In the Meselson-Stahl DNA replication experiment, what percent of the DNA was composed of one light strand and one heavy strand after one generation of growth in N-14 containing growth media?
A 0

B 25

C 50

D 75

E 100

During semiconservative replication, each of the dense strands of parental DNA serves as a template for the synthesis of new DNA. After one generation, all of the daughter DNA's will include one single strand of parental DNA (heavy) and one single strand of newly synthesized DNA (light).

The Biology Project
University of Arizona
Thursday, October 3, 1996
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