Question
Biology Question on DNA Replication
Meselson Stahl experiment on semi- conservative replication demonstrates that
A
50% radioactive, 50% non-radioactive
B
50% non-radioactive
C
50% radioactive
D
None of the above
Answer
50% radioactive, 50% non-radioactive
Explanation
Solution
Mathew Meselson and Franklin Stahl (1957) proved that DNA replication semiconservative. They obtained DNA strands, which were 50% radioactive and 50% non-radioactive. When replicated the radioactively labeled DNA into non radioactive DNA medium. Semiconservative model of DNA replication states that parental DNA separates into two strands and each strands acts as a template for synthesis of new strand. Thus, a daughter DNA will have one old and one new strand.