Home
Class 12
BIOLOGY
Gene regulation governing lactose operon...

Gene regulation governing lactose operon of E. coli that involves the lac I gene product is

A

Negative and inducible because repressor protein prevents transcription

B

Negative and repressible because repressor protsin prevents trenscription

C

Feedback inhibition decause excess of ~beta`- galactosidase can switch off transcripyion

D

Positive and inducible because it can be induced by lactose

Text Solution

Verified by Experts

The correct Answer is:
a
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • MICROBES IN HUMAN WELFARE

    ERRORLESS |Exercise Microbes In Human Welfare|118 Videos

  • PRINCIPLES OF INHERITANCE AND VARIATION

    ERRORLESS |Exercise Principles Of Inheritance And Variation|716 Videos

Similar Questions

Explore conceptually related problems

(a) Explain with the help of schematic representation the lac operon of E. coli. (b) Mention the role of lactose in this operon.

Enlist the genes in Lac operon

Knowledge Check

  • Gene regulation governing lactose operon of E.coli that involves the lac-I gene products is

    A
    Negatively and repressible because repressor protein prevents transcription
    B
    Feedback inhibition becausee excess of `beta`-galactosidase can switch off transcription
    C
    Positive and inducible because it can be induced by lactose
    D
    Negative and inducible because repressor protein prevents transcription

  • Gene regulation governing lactose operon of E.coil that involves the lac I gene product is:

    A
    Positive and inducible because it can be induced by lactose
    B
    Negative and inducible because repressor protein prevents transcription
    C
    Negative and repressible because repressor protein prevents transcription
    D
    Feedback inhibition because excess of `beta`- galactosidase can switch off transcription

  • Gene regulation governing lactose operon of E.coil that involves the lac I gene product is .

    A
    Feedback inhibition beacause excess of `beta` -galactosidase can switch off transcription .
    B
    Positive and inducible because it can be indced by lactose.
    C
    Negative and inducible because repressor protein prevents transcription.
    D
    Negative and respessible because repressor protein prevents transcription

    • Similar Questions

    Explore conceptually related problems

    Given above is the schematic representation of lac operon of E.coli. Explain the functioning of this operon when lactose is provided in the growth medium of the bacteria.

    The sequence of genes in lac operon in E. coli is :

    What is true of E. coli with lac -z gene ?

    The lac operon consists of a regulation gene and three structural gene. The lactose acts as inducer. In the presence of an Inducer such as lactose, the repressor is in inactivated during the interaction. This allows RNA polymerase access to the promoter and transcription proceeds. The repressor is synthesized which in turn binds with the operator region of the operon and prevents RNA polymerase from transcribing the operon. Which of the following statement is true in reference to the lac operon process in E.coli? (i) Galactosidase is the only enzyme produced in large quantities when lac operon is turned on (ii) The messenger RNA in lac operon is a polycistronic mRNA

    The promoter gene in lac operon :

    Home
    Profile