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What effect would you expect if gene expression of the lac operon was completely repressed ?

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The cell would be more efficient without 'wasting' the energy required for the low level of Lac Z, LacY, and Lac A gene expression.

Allolactose would accumulate within the cell and become toxic.

Lactose would not behave as inducer and the operon could not be induced.

Lactose would be converted into the inducer and the operon could be induced

answer is C.

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Detailed Solution

A low level of Lac Z expression is required for conversion of lactose to the inducer, allolactose.

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