Why lac operon and lac trp act in reverse

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Assignment:

When lactose is introduced to a developing E. coli culture, the cells begin producing the enzymes required for lactose utilization. By contrast, when tryptophan is introduced to the culture media, the enzymes involved in the tryptophan pathway are no longer synthesized. Why Lac Operon and Lac Trp act in reverse? Explain it thoroughly.

Reference no: EM133984729

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