LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

MOLECULAR BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
____ proved that DNA replicates by semiconservative replication.
A
Hershey and Chase
B
Griffith
C
Messelson and Stahl
D
Franklin
Explanation: 

Detailed explanation-1: -Conclusion. The experiment done by Meselson and Stahl demonstrated that DNA replicated semi-conservatively, meaning that each strand in a DNA molecule serves as a template for synthesis of a new, complementary strand.

Detailed explanation-2: -The Meselson Stahl Experiment. A centrifuge was used to separate DNA molecules labeled with isotopes of different densities. This experiment revealed a pattern that supports the semiconservative model of DNA replication.

Detailed explanation-3: -After years of theorizing and experimental testing of different mechanisms of DNA replication, Meselson and Stahl conducted the Meselson-Stahl experiment from late 1957 to early 1958 at Caltech. The experiment provided evidence supporting semi-conservative replication of DNA.

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