Match List-I with List-II:
| List-I | List-II |
|---|---|
| Scientist | 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 |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
(A) A. Jeffreys — this matches (III) DNA fingerprinting. Alec Jeffreys first developed the technique of DNA fingerprinting. He used a satellite DNA as a probe that shows very high polymorphism.
(B) Miescher — this matches (I) Nuclein. Friedrich Miescher in 1869 first identified DNA as an acidic substance in the nucleus and named it ‘Nuclein’.
(C) J. Monod — this matches (IV) Transcriptionally regulated system. Francois Jacob and Jacque Monod worked out the lac operon of E. coli. They were the first to explain a transcriptionally regulated system.
(D) S.L. Miller — this matches (II) Amino acid formation. In 1953 Miller passed electric discharge through CH4, H2, NH3 and water vapour at 800°C in a closed flask. Amino acids were formed, which supported the idea that life arose from chemicals.