Class 12 Exam > Class 12 Questions > Case-ITo answer the questions, study the para...
Start Learning for Free
Case-I
To answer the questions, study the paragraph given below:
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.
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.
Q. Identify the correct sequence of the structural genes in the lac operon.
- a)lacA-lacZ-lacY
- b)lacZ-lacA-lacY
- c)lacZ-lacY-lacA
- d)lacA-lacY-lacZ
Correct answer is option 'C'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Case-ITo answer the questions, study the paragraph given below:The lac...
The lac operon consists of 3 structural genes, and a promoter, a terminator, regulator, and an operator. The three structural genes are: lacZ, lacY, and lacA.
Most Upvoted Answer
Case-ITo answer the questions, study the paragraph given below:The lac...
Understanding the Lac Operon
The lac operon is a classic model for gene regulation in prokaryotes, particularly in Escherichia coli. It consists of structural genes that encode proteins necessary for the metabolism of lactose.
Structural Genes in the Lac Operon
The lac operon includes three structural genes:
Correct Sequence: lacZ-lacY-lacA
The correct sequence of the structural genes in the lac operon is lacZ-lacY-lacA. This order is crucial for the proper expression and function of the operon.
Conclusion
Understanding the sequence of the lac operon genes—lacZ-lacY-lacA—helps clarify their functions and the regulation of lactose metabolism in bacteria. The operon's structure is an excellent example of how gene regulation is finely tuned to environmental conditions, such as the presence of lactose.
The lac operon is a classic model for gene regulation in prokaryotes, particularly in Escherichia coli. It consists of structural genes that encode proteins necessary for the metabolism of lactose.
Structural Genes in the Lac Operon
The lac operon includes three structural genes:
- lacZ: Encodes beta-galactosidase, which breaks down lactose into glucose and galactose.
- lacY: Encodes lactose permease, a protein that facilitates the transport of lactose into the bacterial cell.
- lacA: Encodes thiogalactoside transacetylase, involved in the detoxification of byproducts of lactose metabolism.
Correct Sequence: lacZ-lacY-lacA
The correct sequence of the structural genes in the lac operon is lacZ-lacY-lacA. This order is crucial for the proper expression and function of the operon.
- The transcription of these genes occurs as a single mRNA molecule, which is then translated into individual proteins.
- By placing lacZ first, the cell prioritizes the production of beta-galactosidase, essential for lactose metabolism.
- Following this, lacY ensures that lactose can enter the cell efficiently.
- Finally, lacA plays a supporting role in processing the metabolites of lactose digestion.
Conclusion
Understanding the sequence of the lac operon genes—lacZ-lacY-lacA—helps clarify their functions and the regulation of lactose metabolism in bacteria. The operon's structure is an excellent example of how gene regulation is finely tuned to environmental conditions, such as the presence of lactose.
|
Explore Courses for Class 12 exam
|
|
Similar Class 12 Doubts
Case-ITo answer the questions, study the paragraph given below: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.Q.Identify the correct sequence of the structural genes in the lac operon.a)lacA-lacZ-lacYb)lacZ-lacA-lacY c)lacZ-lacY-lacAd)lacA-lacY-lacZCorrect answer is option 'C'. Can you explain this answer?
Question Description
Case-ITo answer the questions, study the paragraph given below: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.Q.Identify the correct sequence of the structural genes in the lac operon.a)lacA-lacZ-lacYb)lacZ-lacA-lacY c)lacZ-lacY-lacAd)lacA-lacY-lacZCorrect answer is option 'C'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Case-ITo answer the questions, study the paragraph given below: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.Q.Identify the correct sequence of the structural genes in the lac operon.a)lacA-lacZ-lacYb)lacZ-lacA-lacY c)lacZ-lacY-lacAd)lacA-lacY-lacZCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Case-ITo answer the questions, study the paragraph given below: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.Q.Identify the correct sequence of the structural genes in the lac operon.a)lacA-lacZ-lacYb)lacZ-lacA-lacY c)lacZ-lacY-lacAd)lacA-lacY-lacZCorrect answer is option 'C'. Can you explain this answer?.
Case-ITo answer the questions, study the paragraph given below: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.Q.Identify the correct sequence of the structural genes in the lac operon.a)lacA-lacZ-lacYb)lacZ-lacA-lacY c)lacZ-lacY-lacAd)lacA-lacY-lacZCorrect answer is option 'C'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Case-ITo answer the questions, study the paragraph given below: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.Q.Identify the correct sequence of the structural genes in the lac operon.a)lacA-lacZ-lacYb)lacZ-lacA-lacY c)lacZ-lacY-lacAd)lacA-lacY-lacZCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Case-ITo answer the questions, study the paragraph given below: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.Q.Identify the correct sequence of the structural genes in the lac operon.a)lacA-lacZ-lacYb)lacZ-lacA-lacY c)lacZ-lacY-lacAd)lacA-lacY-lacZCorrect answer is option 'C'. Can you explain this answer?.
Solutions for Case-ITo answer the questions, study the paragraph given below: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.Q.Identify the correct sequence of the structural genes in the lac operon.a)lacA-lacZ-lacYb)lacZ-lacA-lacY c)lacZ-lacY-lacAd)lacA-lacY-lacZCorrect answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.
Here you can find the meaning of Case-ITo answer the questions, study the paragraph given below: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.Q.Identify the correct sequence of the structural genes in the lac operon.a)lacA-lacZ-lacYb)lacZ-lacA-lacY c)lacZ-lacY-lacAd)lacA-lacY-lacZCorrect answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Case-ITo answer the questions, study the paragraph given below: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.Q.Identify the correct sequence of the structural genes in the lac operon.a)lacA-lacZ-lacYb)lacZ-lacA-lacY c)lacZ-lacY-lacAd)lacA-lacY-lacZCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for Case-ITo answer the questions, study the paragraph given below: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.Q.Identify the correct sequence of the structural genes in the lac operon.a)lacA-lacZ-lacYb)lacZ-lacA-lacY c)lacZ-lacY-lacAd)lacA-lacY-lacZCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of Case-ITo answer the questions, study the paragraph given below: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.Q.Identify the correct sequence of the structural genes in the lac operon.a)lacA-lacZ-lacYb)lacZ-lacA-lacY c)lacZ-lacY-lacAd)lacA-lacY-lacZCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Case-ITo answer the questions, study the paragraph given below: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.Q.Identify the correct sequence of the structural genes in the lac operon.a)lacA-lacZ-lacYb)lacZ-lacA-lacY c)lacZ-lacY-lacAd)lacA-lacY-lacZCorrect answer is option 'C'. Can you explain this answer? tests, examples and also practice Class 12 tests.
|
|
Explore Courses for Class 12 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup