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In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A):'Lac Operon Model' is applicable only to E.coli.
Reason(R): E.coli lacks a definite nucleus.
Read the statements carefully, and mark the correct answer.
Assertion(A):'Lac Operon Model' is applicable only to E.coli.
Reason(R): E.coli lacks a definite nucleus.
- a)Both assertion and reason are true and reason is the correct explanation of assertion.
- b)Both assertion and reason are true but reason is not the correct explanation of assertion.
- c)Assertion is true but reason is false.
- d)Both assertion and reason are false.
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
In the following question, a statement of Assertion(A) is given follo...
In E. coli, synthesis of β galactosidase, an enzyme meant for hydrolysis of lactose into glucose and galactose, has been studied in considerable detail.
Lactose → β g a l a c t o s i d a s e glucose + galactose
If β galactosides (e.g., lactose) are not supplied to E. coli cells, the presence of β galactosidase is hardly detectable, but as soon as lactose in added, production of enzyme β galactosidase increases as much as 10,000 times. The enzyme quantity again fall down as quickly as the substance (i.e. lactose) is removed. Such enzymes, whose synthesis can be induced by adding, substrate are known as "inducible enzymes". F. Jacob and J. Monod in 1961, on the basis of their study on the inducible system for the synthesis of β galactosidase enzyme in E. coli, proposed a model in order to explain the induction or repression of enzyme synthesis. The model is popularly known as "operon model", E. coli like other bacteria has incipient nucleus, i.e. nucleoid.
Lactose → β g a l a c t o s i d a s e glucose + galactose
If β galactosides (e.g., lactose) are not supplied to E. coli cells, the presence of β galactosidase is hardly detectable, but as soon as lactose in added, production of enzyme β galactosidase increases as much as 10,000 times. The enzyme quantity again fall down as quickly as the substance (i.e. lactose) is removed. Such enzymes, whose synthesis can be induced by adding, substrate are known as "inducible enzymes". F. Jacob and J. Monod in 1961, on the basis of their study on the inducible system for the synthesis of β galactosidase enzyme in E. coli, proposed a model in order to explain the induction or repression of enzyme synthesis. The model is popularly known as "operon model", E. coli like other bacteria has incipient nucleus, i.e. nucleoid.
Most Upvoted Answer
In the following question, a statement of Assertion(A) is given follo...
Explanation:
Assertion(A): 'Lac Operon Model' is applicable only to E.coli.
Reason(R): E.coli lacks a definite nucleus.
Explanation:
- The Lac Operon Model was first discovered in the bacterium E. coli and is a well-known example of gene regulation in prokaryotes.
- E. coli is a prokaryotic organism, meaning it lacks a membrane-bound nucleus. Instead, its genetic material is present in the cytoplasm in the form of a nucleoid.
- The Lac Operon Model is specific to prokaryotic organisms like E. coli because it involves the regulation of gene expression in the absence of a nucleus.
- In eukaryotic organisms, gene regulation is more complex and involves the presence of a nucleus and various other organelles.
Therefore, both the assertion and reason are true, but the reason is not the correct explanation of the assertion. The Lac Operon Model is applicable only to E. coli because of its prokaryotic nature, not solely because it lacks a definite nucleus.
Assertion(A): 'Lac Operon Model' is applicable only to E.coli.
Reason(R): E.coli lacks a definite nucleus.
Explanation:
- The Lac Operon Model was first discovered in the bacterium E. coli and is a well-known example of gene regulation in prokaryotes.
- E. coli is a prokaryotic organism, meaning it lacks a membrane-bound nucleus. Instead, its genetic material is present in the cytoplasm in the form of a nucleoid.
- The Lac Operon Model is specific to prokaryotic organisms like E. coli because it involves the regulation of gene expression in the absence of a nucleus.
- In eukaryotic organisms, gene regulation is more complex and involves the presence of a nucleus and various other organelles.
Therefore, both the assertion and reason are true, but the reason is not the correct explanation of the assertion. The Lac Operon Model is applicable only to E. coli because of its prokaryotic nature, not solely because it lacks a definite nucleus.
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Community Answer
In the following question, a statement of Assertion(A) is given follo...
In E. coli, synthesis of β galactosidase, an enzyme meant for hydrolysis of lactose into glucose and galactose, has been studied in considerable detail.
Lactose → β g a l a c t o s i d a s e glucose + galactose
If β galactosides (e.g., lactose) are not supplied to E. coli cells, the presence of β galactosidase is hardly detectable, but as soon as lactose in added, production of enzyme β galactosidase increases as much as 10,000 times. The enzyme quantity again fall down as quickly as the substance (i.e. lactose) is removed. Such enzymes, whose synthesis can be induced by adding, substrate are known as "inducible enzymes". F. Jacob and J. Monod in 1961, on the basis of their study on the inducible system for the synthesis of β galactosidase enzyme in E. coli, proposed a model in order to explain the induction or repression of enzyme synthesis. The model is popularly known as "operon model", E. coli like other bacteria has incipient nucleus, i.e. nucleoid.
Lactose → β g a l a c t o s i d a s e glucose + galactose
If β galactosides (e.g., lactose) are not supplied to E. coli cells, the presence of β galactosidase is hardly detectable, but as soon as lactose in added, production of enzyme β galactosidase increases as much as 10,000 times. The enzyme quantity again fall down as quickly as the substance (i.e. lactose) is removed. Such enzymes, whose synthesis can be induced by adding, substrate are known as "inducible enzymes". F. Jacob and J. Monod in 1961, on the basis of their study on the inducible system for the synthesis of β galactosidase enzyme in E. coli, proposed a model in order to explain the induction or repression of enzyme synthesis. The model is popularly known as "operon model", E. coli like other bacteria has incipient nucleus, i.e. nucleoid.
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In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).Read the statements carefully, and mark the correct answer. Assertion(A):'Lac Operon Model' is applicable only to E.coli.Reason(R): E.coli lacks a definite nucleus.a) Both assertion and reason are true and reason is the correct explanation of assertion. b) Both assertion and reason are true but reason is not the correct explanation of assertion. c) Assertion is true but reason is false. d) Both assertion and reason are false. Correct 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 the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).Read the statements carefully, and mark the correct answer. Assertion(A):'Lac Operon Model' is applicable only to E.coli.Reason(R): E.coli lacks a definite nucleus.a) Both assertion and reason are true and reason is the correct explanation of assertion. b) Both assertion and reason are true but reason is not the correct explanation of assertion. c) Assertion is true but reason is false. d) Both assertion and reason are false. Correct 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 the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).Read the statements carefully, and mark the correct answer. Assertion(A):'Lac Operon Model' is applicable only to E.coli.Reason(R): E.coli lacks a definite nucleus.a) Both assertion and reason are true and reason is the correct explanation of assertion. b) Both assertion and reason are true but reason is not the correct explanation of assertion. c) Assertion is true but reason is false. d) Both assertion and reason are false. Correct answer is option 'B'. Can you explain this answer?.
In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).Read the statements carefully, and mark the correct answer. Assertion(A):'Lac Operon Model' is applicable only to E.coli.Reason(R): E.coli lacks a definite nucleus.a) Both assertion and reason are true and reason is the correct explanation of assertion. b) Both assertion and reason are true but reason is not the correct explanation of assertion. c) Assertion is true but reason is false. d) Both assertion and reason are false. Correct 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 the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).Read the statements carefully, and mark the correct answer. Assertion(A):'Lac Operon Model' is applicable only to E.coli.Reason(R): E.coli lacks a definite nucleus.a) Both assertion and reason are true and reason is the correct explanation of assertion. b) Both assertion and reason are true but reason is not the correct explanation of assertion. c) Assertion is true but reason is false. d) Both assertion and reason are false. Correct 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 the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).Read the statements carefully, and mark the correct answer. Assertion(A):'Lac Operon Model' is applicable only to E.coli.Reason(R): E.coli lacks a definite nucleus.a) Both assertion and reason are true and reason is the correct explanation of assertion. b) Both assertion and reason are true but reason is not the correct explanation of assertion. c) Assertion is true but reason is false. d) Both assertion and reason are false. Correct answer is option 'B'. Can you explain this answer?.
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