Lactose operon of Escherichia coli is _______________

Monocistronic

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Inducible

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Repressible

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Both B and C

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Solution

The correct option is B Inducible
The presence of Lactose in the food induces the Lac operon in E. coli to start working. Therefore Lac operon is classified as inducible operon.

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E. coli cells with a mutated Z gene of the Lac operon cannot grow in a medium containing only lactose as the source of energy because

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