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प्रश्न
Enlist the genes in Lac operon
उत्तर
Genes present in lac operon:
- Regulatory gene: Gene i,
- Structural genes: lac a, lac y and lac z.
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संबंधित प्रश्न
Short Answer Question:
Explain the role of lactose in ‘Lac Operon’.
Which of the following gene is responsible for the synthesis of repressor in operon?
______ refers to the chemical molecule present in the cytoplasm that inactivates the repressor.
Lactose operon produces enzymes ______.
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.
In lac operon, lactose is the substrate for enzyme beta-galactocidase and its regulates ______.
In lac operon system, gene - z codes for ______.
Study the schematic representation of the genes involved in the lac operon given below and answer the questions that follow:
| p | i | p | o | z | y | a |
(a) The active site of enzyme permease present in the cell membrane of a bacterium has been blocked by an inhibitor, how will it affect the lac operon?
(b) The protein produced by the i gene has become abnormal due to unknown reasons. Explain its impact on lactose metabolism stating the reason.
(c) If the nutrient medium for the bacteria contains only galactose; will operon be expressed? Justify your answer.
In which condition, lac operon is switched off?
