In E.coli structural gene of lac operon is stimulated in
Correct Answer: Presence of lactose and absence of glucose
Description: JACOB and MONAD theory was based on the observation on lactose metabolism in E.coli Cell grown in glucose medium does not contain beta-galactosidase But when cells are transferred to medium containing only lactose, then the enzyme level in the cell increases several thousand foldsRef: DM Vasudevan, 7th edition, page no: 617
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