Question Detail
Question
Consider the following statements: I. Friedrich Miescher first isolated nucleic acids from pus cells. 2. Hershey and Chase showed through experiment that genetic material was DNA and not protein. 3. Meselson and Stahl proved the semiconservative replication of DNA. Which of the statements given above are correct?
Correct Answer
Option D is the correct answer.
Detailed Explanation
All three statements are correct. Friedrich Miescher first isolated nucleic acids (which he called 'nuclein') from white blood cells in pus in 1869. The Hershey-Chase experiment (1952) using bacteriophages provided conclusive evidence that DNA, not protein, is the genetic material. Meselson and Stahl's experiment (1958) using isotopic nitrogen demonstrated that DNA replication is semiconservative.
Hint
Review the key historical experiments that established the role and nature of DNA.