When glucose is substituted by lactose in the growth medium of the E. coli bacteria, lactose enters the cells and acts as an inducer of the lac operon. It then leads to transcription of enzymes that enable effective digestion of lactose. Instead of lactose an unknown sugar medium is used and there is no glucose in the medium. How would the unknown sugar affect the lac operon? A. It will induce the lac operon. B. It will have no effect on the lac operon. C. It will enable its conversion to lactose which will then induce the lac operon. D. It may or may not induce the lac operon depending on whether the repressor is being produced or not.

When glucose is substituted by lactose in the growth medium of the E.

1.	When glucose is substituted by lactose in the growth medium of the E. coli bacteria, lactose enters the cells and acts as an inducer of the lac operon. It then leads to transcription of enzymes that enable effective digestion of lactose. Instead of lactose an unknown sugar medium is used and there is no glucose in the medium. How would the unknown sugar affect the lac operon? A. It will induce the lac operon. B. It will have no effect on the lac operon. C. It will enable its conversion to lactose which will then induce the lac operon. D. It may or may not induce the lac operon depending on whether the repressor is being produced or not.
Answer» B. It will have no effect on the lac operon.

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