Question

Identify the correct pair of combinations.

I)	${14}_C$	Distinction between PS I and PS II
II)	${15}_N$	Semiconservative replication of DNA
III)	${35}_S$	Polypeptide synthesis
IV)	${32}_P$	Identification of chemical nature of genetic material

• A. II, III
• B. II, IV
• C. I, II
• D. I, III

Answer 1

The correct option is B II, IV

Meselson and Stahl experiment to demonstrate the correctness of the semiconservative model of DNA replication involved the use of ${}^{15}N$ isotope and the experiments by Hershey and Chase experiments to determine if the actual genetic material of a cell is protein or DNA involved the use of ${}^{32}P$ labeled DNA. So, the correct answer is D.