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Jacob and Monod studied lactose metabolism in E.coli and proposed operon concept. Operon concept is applicable for

1. all prokaryotes
2. all prokaryotes and some eukaryotes
3. all prokaryotes and all eukaryotes
4. all prokaryotes and some protozoans

Correct answer: all prokaryotes

Solution

The operon concept was first proposed by Jacob and Monod to explain the regulation of gene expression in prokaryotes.

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