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In lac operon, z gene codes for (NEET 2022 Phase 2)
- a)Transacetylase
- b)β-galactosidase
- c)Permease
- d)Repressor
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
In lac operon, z gene codes for (NEET 2022 Phase 2)a)Transacetylaseb)...
In lac operon, z gene codes for β-galactosidase.
Transacetylase, permease and repressor protein are coded by genes 'a', 'y' and 'i' respectively.
Transacetylase, permease and repressor protein are coded by genes 'a', 'y' and 'i' respectively.
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In lac operon, z gene codes for (NEET 2022 Phase 2)a)Transacetylaseb)...
Understanding the Lac Operon
The lac operon is a well-studied model in molecular biology that illustrates the regulation of gene expression in prokaryotes, specifically in E. coli. It consists of three structural genes: lacZ, lacY, and lacA.
Role of the lacZ Gene
- The lacZ gene specifically encodes for the enzyme β-galactosidase.
- This enzyme is crucial for the metabolism of lactose, as it catalyzes the hydrolysis of lactose into glucose and galactose.
Other Genes in the Lac Operon
- lacY: This gene encodes for permease, which facilitates the transport of lactose into the bacterial cell.
- lacA: The lacA gene codes for transacetylase, an enzyme involved in the detoxification of byproducts resulting from lactose metabolism.
Importance of β-galactosidase
- β-galactosidase is essential for the utilization of lactose as an energy source, particularly when glucose, the preferred energy source for E. coli, is not available.
- The presence of lactose in the environment triggers the expression of the lac operon, leading to the production of β-galactosidase, enabling the bacteria to utilize lactose efficiently.
Conclusion
The lac operon is a prime example of gene regulation in bacteria. The lacZ gene's role in coding for β-galactosidase underscores its importance in lactose metabolism, making option 'B' the correct answer in this context.
The lac operon is a well-studied model in molecular biology that illustrates the regulation of gene expression in prokaryotes, specifically in E. coli. It consists of three structural genes: lacZ, lacY, and lacA.
Role of the lacZ Gene
- The lacZ gene specifically encodes for the enzyme β-galactosidase.
- This enzyme is crucial for the metabolism of lactose, as it catalyzes the hydrolysis of lactose into glucose and galactose.
Other Genes in the Lac Operon
- lacY: This gene encodes for permease, which facilitates the transport of lactose into the bacterial cell.
- lacA: The lacA gene codes for transacetylase, an enzyme involved in the detoxification of byproducts resulting from lactose metabolism.
Importance of β-galactosidase
- β-galactosidase is essential for the utilization of lactose as an energy source, particularly when glucose, the preferred energy source for E. coli, is not available.
- The presence of lactose in the environment triggers the expression of the lac operon, leading to the production of β-galactosidase, enabling the bacteria to utilize lactose efficiently.
Conclusion
The lac operon is a prime example of gene regulation in bacteria. The lacZ gene's role in coding for β-galactosidase underscores its importance in lactose metabolism, making option 'B' the correct answer in this context.
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In lac operon, z gene codes for (NEET 2022 Phase 2)a)Transacetylaseb)β-galactosidasec)Permeased)RepressorCorrect answer is option 'B'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about In lac operon, z gene codes for (NEET 2022 Phase 2)a)Transacetylaseb)β-galactosidasec)Permeased)RepressorCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In lac operon, z gene codes for (NEET 2022 Phase 2)a)Transacetylaseb)β-galactosidasec)Permeased)RepressorCorrect answer is option 'B'. Can you explain this answer?.
In lac operon, z gene codes for (NEET 2022 Phase 2)a)Transacetylaseb)β-galactosidasec)Permeased)RepressorCorrect answer is option 'B'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about In lac operon, z gene codes for (NEET 2022 Phase 2)a)Transacetylaseb)β-galactosidasec)Permeased)RepressorCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In lac operon, z gene codes for (NEET 2022 Phase 2)a)Transacetylaseb)β-galactosidasec)Permeased)RepressorCorrect answer is option 'B'. Can you explain this answer?.
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