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प्रश्न
Which one of the following is not a part of lac operon?
विकल्प
Promoter
Regulator
Inducer
Operator
उत्तर
Inducer
Explanation:
Lac operon consists of the following components:
- Regulator gene (repressor gene)
- Promoter gene
- Operator gene
- Structural genes
- Inducer: It is not a component of an operon.
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संबंधित प्रश्न
Short Answer Question:
Describe the structure of ‘Operon’.
Give diagrammatic representation of Lac-operon in the presence of inducer.
Which of the following is NOT the part of an operon?
Identify the INCORRECT statement/s.
- Regulation of lac operon by repressor is referred to as negative regulation.
- The repressor protein produced by regulator gene binds to the operator region.
- The sequence constituting the operator region is present upstream of promoter region
- Each operon bas a specific 'Operator'.
Lac operon consists of ______.
Which enzyme will produce in a cell in which there is a nonsense mutation in the lac Y-gene?
Which of the following is required as an inducer(s) for the expression of lac operon?
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.
Select the correct pair.
Explain the components of the structural genes in the Lac operon system in E.coli.
