In Escherichia coli, the lac operon is induced by: (a) lactose (b) promoter gene (c) β-galactosidase (d) I-gene
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Step 1: The lac operon in Escherichia coli is induced by lactose. Show more…
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In a bacteria that possesses the lac operon, which of the following occurs when glucose is low and lactose is abundant? a. Lactose transport to the cell is improved. b. Lactose metabolism is increased by the binding of lactose to the operon. c. Lactose permease converts lactose to glucose and galactose. d. Beta-galactosidase activates the operon.
Shaiju T.
The lac operon in E. coli controls the gene expression of the enzymes that digest lactose in the cell. In the presence of lactose, the lac operon will turn on and the genes will be expressed. Place the events of gene regulation by the lac operon in order of their occurrence, from the introduction of lactose to the environment to when the cell begins to digest lactose. A. The repressor is removed from the operator. B. RNA polymerase binds to the promoter region. C. Lactose enzyme genes are expressed by the operon. D. The regulatory gene expresses the repressor protein. E. The repressor is inactivated by lactose.
Anand J.
which of the following is produced by E-Coli in lactose operon. a) B galactose b) Transacetylase c) permease d) all of these
Mithlesh K.
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