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16 May, 06:53

E. coli grown in the presence of lactose, but absence of glucose, will use the enzyme beta-galactosidase to digest lactose. How are these cells different from cells which are grown in the absence of lactose and presence of glucose

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  1. 16 May, 07:17
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    Answer: Lac operon

    Explanation: the same cells when grown in glucose media utilize the glucose as source if energy by blocking the activity of the enzyme beta - galactosidase. the operator site of the operon is blocked thereby preventing the activity of the collective functional genes.
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