Question

Statement 1: Avery, McLeod, and McCarty discovered the semi-conservative nature of DNA.
Statement 2: Meselson and Stahl used \( \text{E. coli} \) to demonstrate the semi-conservative nature of DNA.

• A. Statement 1 is correct, Statement 2 is incorrect
• B. Statement 2 is correct, Statement 1 is incorrect
• C. Both statements are correct
• D. Both statements are incorrect

Hint:

Avery et al. established DNA as genetic material, while Meselson and Stahl demonstrated its semi-conservative replication.

Answer 1

The Correct Option is B

Avery, McLeod, and McCarty demonstrated that DNA is the genetic material but did not discover its semi-conservative nature. Meselson and Stahl, through their experiment with \( \text{E. coli} \) and \( \text{N}^{15} \)-labeled DNA, provided conclusive evidence for the semi-conservative replication of DNA. --- Final Answer: \[ \boxed{\text{Statement 2 is correct, Statement 1 is incorrect}} \]