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.

Question

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Statement 1: Avery, McLeod, and McCarty discovered the semi-conservative nature of DNA. Statement 2: Meselson and Stahl used E. coli to demonstrate the semi-conservative nature of DNA. Analysis: Statement 1 is incorrect. Avery, McLeod, and McCarty demonstrated that DNA, not protein, is the genetic material. They did not discover the semi-conservative nature of DNA replication. Statement 2 is correct. Meselson and Stahl conducted experiments using E. coli and isotopes of nitrogen to prove that DNA replication is semi-conservative. Therefore, the correct answer is: Option 2: Statement 2 is correct, Statement 1 is incorrect

Answer

Statement 1 is correct, Statement 2 is incorrect

Answer

Statement 2 is correct, Statement 1 is incorrect

Answer

Both statements are correct

Answer

Both statements are incorrect

List I		List II
A	Frederick Griffith	I	Genetic code
B	Francois Jacob & Jacque	II	Semi-conservative mode of DNA replication
C	Har Gobind Khoran	III	Transformation
D	Meselson & Stahl	IV	Lac operon

	List-1 (Scientists)		List-II (Contribution)
A	Maxam-Gilbert	I	DNA polymerase isolation
B	Stanley Cohen	II	DNA sequencing
C	Kornberg	III	Genetic code
D	Har Gobind Khorana	IV	DNA cloning

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.

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The Correct Option is B

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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.