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(c) Francois Jacob and Jacque Monod proposed the model of gene regulation known as operon model/lac operon. Alec Jeffreys gave DNA fingerprinting technique. Matthew Meselson and F. Stahl gave semi-conservative DNA replication in E.coli. Alfred Hershey and Martha Chase proved DNA as genetic material not protein.

1. (a)
2. (b)
3. (c)
4. (d)

Correct answer: (c)

Solution

The operon model is a key concept in gene regulation, and Francois Jacob and Jacque Monod are credited with its development.

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