Question

Match List-I with List-II:

List-I (Scientist)	List-II (Contribution)
(A) A. Jeffreys	(I) Nuclein
(B) Miescher	(II) Amino acid formation
(C) J. Monod	(III) DNA fingerprinting
(D) S.L. Miller	(IV) Transcriptionally regulated system

• A. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
• B. (A)-(I), (B)-(III), (C)-(IV), (D)-(II)
• C. (A)-(III), (B)-(I), (C)-(II), (D)-(IV)
• D. (A)-(I), (B)-(III), (C)-(II), (D)-(IV)

Answer 1

The Correct Option is A

To solve the problem of matching scientists with their corresponding contributions from List-I and List-II, follow these steps:

Scientist	Contribution
(A) A. Jeffreys	(III) DNA fingerprinting
(B) Miescher	(I) Nuclein
(C) J. Monod	(IV) Transcriptionally regulated system
(D) S.L. Miller	(II) Amino acid formation

This matching is based on their significant scientific contributions: 

• A. Jeffreys: Known for developing techniques for DNA fingerprinting, revolutionizing forensic science.
• Miescher: Discovered nuclein, which we now know as DNA, from white blood cells.
• J. Monod: Famous for work on the transcriptionally regulated system, especially in bacterial cells.
• S.L. Miller: Conducted experiments on amino acid formation under prebiotic conditions, supporting the origin of life studies.

The correct set of matches is: (A)-(III), (B)-(I), (C)-(IV), (D)-(II).

Answer 2

Let's match each scientist to their correct contribution:

(A) A. Jeffreys: A. Jeffreys is known for DNA fingerprinting, a technique used to identify individuals based on their DNA. This technique has been pivotal in forensic science and genetic research.

(B) Miescher: Miescher discovered nuclein, which was later known as DNA. He was the first to isolate this substance from the nuclei of cells.

(C) J. Monod: J. Monod is known for his work on transcriptionally regulated systems, specifically in the context of the lac operon in bacteria, which regulates gene expression.

(D) S.L. Miller: S.L. Miller is famous for his experiment on amino acid formation, which demonstrated the possibility of organic molecules like amino acids forming under prebiotic conditions, contributing to the theory of the origin of life.

Thus, the correct matching is:

(A)-(III): A. Jeffreys → DNA fingerprinting

(B)-(I): Miescher → Nuclein

(C)-(IV): J. Monod → Transcriptionally regulated system

(D)-(II): S.L. Miller → Amino acid formation

The correct answer is (1) (A)-(III), (B)-(I), (C)-(IV), (D)-(II).