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Lactose utilization by E. coli requires ____________

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Lactose utilization by E. coli requires ____________

(a) Lac-Z

(b) Lac-A

(c) Lac-Y

(d) Lac-l

This question was posed to me by my school teacher while I was bunking the class.

Query is from Principles of Gene Regulation topic in section Regulation of Gene Expression and Miscellaneous of Biochemistry

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Best answer
The correct choice is (c) Lac-Y

The best explanation: Lactose utilization by E. coli requires lac-Y.

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