Home
Class 12
BIOLOGY
In lac operon the lac mRNA...

In lac operon the lac mRNA

A

A monocistronic structural gene is regulated by a common promoter and regulatory genes

B

Glucose and galactose can act as inducers

C

The 'y' gene codes for permease,which increases permeability of the cell to beta-galactosides

D

Allolactose is the repressor

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • TEST 5

    AAKASH INSTITUTE ENGLISH|Exercise EXAMPLE|625 Videos

  • TEST 7

    AAKASH INSTITUTE ENGLISH|Exercise Exercise|177 Videos

Similar Questions

Explore conceptually related problems

Lac operon is

In lac operon, there are three structural genes in which uli codes for ulii that increases permeability of the cell to B-galactosides.Select the correct option to fill in the blanks (i) & (ii).

In lac operon,the regulator gene codes for

In lac operon RNA polymerase binds with

In Lac operon this lies upstream to the operator region

In the lac operon, the structural genes are switched off when

Assertion :- In lac operon, in the presence of inducer RNA polymerase access to the promotor and transcription proceeds. Reason:- In lac operon in the presence of inducer repressor protein is inactivated

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

In lac operon, a helper protein that binds to the promotor and facilitaties attachment of RNA polymerase and accelerates the rate of transcription. This protein is called

(a) Explain the role of regulatory gene, operator and structural genes in lac operon when E. Coli is growing in a culture medium with the sources of energy as lactose.