Semiconservative DNA Replication Experiment
Meselson and Stahl labeled the DNA of E. coli with N15 and placed the bacteria in a growth medium containing only N14. Which of the following best explains how their experiment demonstrated that DNA replication is semiconservative?
A
After one round of replication, only N14 DNA was present.
B
After one round of replication, the DNA consisted of a mixture of molecules containing either two strands of N15 DNA or two strands of N14 DNA.
C
After one round of replication, individual DNA strands contained segments of both N15 and N14 DNA.
D
After one round of replication, only N15 DNA was present.
E
After one round of replication, the DNA consisted of molecules containing one strand of N15 DNA and one strand of N14 DNA.