Lactose is the substrate for the enzyme ...

Lactose is the substrate for the enzyme `beta`- galactosidase and it regulates switching on and off of the operon. Hence it is termed as

inducer

repressor

aporepressor

co - repressor

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Assertion (A): Lactose is the substrate for the enzyme beta-galactosidase and it regulates switching on and off of the lac operon. Reason ( R): The lac operon consists of one regulatory gene and three structural genes.

Read the following statements w.r.t. lac operon. Br a. lac-i is the constitutive gene. Br b. lac-y codes for permease to increase permeability of cell to Beta -galactoside. Br c. Lactose is the substrate for the enzyme B- galactosidase and it regulates switching on and off of the operon. br d. Regulation of lac operan can be also visualised as regulation of enzyme synthesis by its substrate.

Assertion :- Lactose is the substrate for the enzyme beta -galactosidse & it regulates switching on & off of the operon. Reson: A very low level of expression of lac operon is always present in cell all the time.

In the lac operon system, beta-galactosidase is coded by

In Iac-operon, beta -galactosidase enzyme is made by

Read the statements regarding the lac operon and choose the correct option. 1. An inducer regulates the switching on and off of lac operon. 2. Repressor protein dissociates from operator region and prevents RNA polymerase from transcribing the operon. 3. In the presence of lactose, the repressor is activated by interaction with lactose. 4. RNA polymerase has access to the promoter and transcription proceeds only when the repressor is inactivated.

Lactose (Lac) operon is regulated by :

Lactose operon produces enzymes

Read the following statements for lac operon: i. Each operon has its specific operator and specific repressor. ii. The y gene codes permease, which increases the permeability of the cell to beta-galactosides. iii. Regulation of lac operon can be visualized as regulation of enzyme synthesis by its substrate. Select the option with the correct statements.

In E. coli, tryptophan switches off the trp operon by

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