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प्रश्न
How does the operon function in the presence of lactose?
उत्तर
- Lactose induces the lac operon. The regulatory gene is activated when lactose is added to the bacteria's medium.
- The inducer binds to the repressor protein, rendering it inactive, allowing transcription of the operon.
- Thus, the lac operon is negatively regulated in this case.
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संबंधित प्रश्न
In lac operon, lactose acts as:
Explain the role of Lactose as an inducer in Lac-operon.
Select the WRONG statement from the following with reference to lac operon.
In which of the following conditions the lac operon in E. coli becomes "switched on"?
In lac operon concept of gene expression, allolactose acts as, ____________.
In E.coli, the lac operon gets switched on when ______.
Select the two correct statements out of the four (A-D) given below about lac operon.
- Glucose or galactose may bind with the repressor and inactivate it.
- In the absence of lactose, the repressor binds with the operator region.
- The z-gene codes for permease.
- This was elucidated by Francois Jacob and Jacque Mono.
E. coli cells with a mutated Z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because ______.
A low level of expression of lac operon occurs at all the time. Can you explain the logic behind this phenomena.
In the medium where E. coli was growing, lactose was added, which induced the lac operon. Then, why does lac operon shut down some time after addition of lactose in the medium?
