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What major concept did Jacob and Monod introduce?

Gene therapy
The operon model
Antibiotic resistance
DNA fingerprinting

Answer

The operon model, introduced by Jacob and Monod, revolutionized our understanding of gene regulation. It elegantly explains how groups of genes can be coordinately controlled in response to environmental cues. By integrating DNA structure, transcription regulation, and enzyme synthesis, the operon model established a foundation for modern molecular biology and biotechnology. Its impact is far-reaching, shaping our understanding of diverse biological processes from bacteria to humans.