If a particular operon encodes enzymes for making an essential amino acid and is regulated like the trp operon, then A. the amino acid inactivates the repressor. B. the repressor is active in the absence of the amino acid. C. the amino acid acts as a corepressor. D. the amino acid turns on transcription of the operon.

Question

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Answer 1

Textbook Question

Chapter 15, Problem 1TYU

If a particular operon encodes enzymes for making an essential amino acid and is regulated like the trp operon, then

A. the amino acid inactivates the repressor.
B. the repressor is active in the absence of the amino acid.
C. the amino acid acts as a corepressor.
D. the amino acid turns on transcription of the operon.

Expert Solution & Answer

Summary Introduction

Introduction:

Operon refers to the functional unit of the DNA (genomic). It consist of various genes that controls operon’s regulation. There are two types of operons; lac (lactose) and Trp (tryptophan).

Answer to Problem 1TYU

Correct answer:

If a particular operon encodes certain enzymes for forming an amino acid and is regulated as Trp operon, then the amino acid will be acting like a corepressor molecule. Therefore, option (C) is correct.

Explanation of Solution

Reason for the correct statement:

A Trp operon is a group of genes, which encodes certain enzymes (biosynthetic) for tryptophan. This is expressed when the levels of tryptophan is low. An operon that encodes certain enzymes for the formation of amino acids and acts like a Trp operon, then, the amino acids will act like a corepressor. A corepressor is a small molecule that cooperates with the repressor protein for switching the operon off.

Option (C) is given as “the amino acid acts as a corepressor”.

“If a particular operon encodes certain enzymes for forming an amino acid and is regulated as Trp operon, then the amino acid will be acting like a corepressor molecule”, it is the right answer.

Hence, the option (C) is correct.

Reasons for the incorrect statements:

Option (A) is given as “the amino acid inactivates the repressor”.

The amino acid will be acting like a corepressor, hence it will not inactivate the repressor, and however it will react with the repressor. So, it is a wrong answer.

Option (B) is given as “the repressor is active in the absence amino acid”.

If the operon has to be kept ON, then the repressor will be inactive in the absence of amino acid. So, it is a wrong answer.

Option (D) is given as “the amino acid turns on the transcription of operon”.

The amino acid is not responsible for turning the transcription ON. So, it is a wrong answer.

Hence, options (A), (B), and (D) are incorrect.

Conclusion

The amino acid will be acting like a corepressor molecule as if a particular operon encodes certain enzymes for forming an amino acid and is regulated as the Trp operon.

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Students have asked these similar questions

A mutation in the operator region of the trp operon can prevent the trp repressor from binding to this operator. When these mutant cells are placed in a solution containing chicken broth, which of the following happens? a. Tryptophan would bind to the repressor. b. The Repressor would bind to the operator irrespective of the presence of amino acids in the environment. c. The transcription of the trip operon would be inhibited. d. The transcription of the repressor protein is inhibited

In E. coli, induction in the lac operon and repression in the trp operon are both examples of a. negative control by a repressor. b. positive control by a repressor. c. negative control by an activator. d. positive control by a repressor.

Mutations may have an effect on the expression of the lac operon and the trp operon. Would the following mutations have a cis- or transeffect on the expression of the protein-encoding genes in the operon? A. A mutation in the operator site that prevents lac repressor from binding to it B. A mutation in the lacI gene that prevents lac repressor from binding to DNA C. A mutation in the trpL gene that prevents attenuation

Answer 2

Textbook Question

Chapter 15, Problem 1TYU

If a particular operon encodes enzymes for making an essential amino acid and is regulated like the trp operon, then

A. the amino acid inactivates the repressor.
B. the repressor is active in the absence of the amino acid.
C. the amino acid acts as a corepressor.
D. the amino acid turns on transcription of the operon.

Expert Solution & Answer

Summary Introduction

Introduction:

Operon refers to the functional unit of the DNA (genomic). It consist of various genes that controls operon’s regulation. There are two types of operons; lac (lactose) and Trp (tryptophan).

Answer to Problem 1TYU

Correct answer:

If a particular operon encodes certain enzymes for forming an amino acid and is regulated as Trp operon, then the amino acid will be acting like a corepressor molecule. Therefore, option (C) is correct.

Explanation of Solution

Reason for the correct statement:

A Trp operon is a group of genes, which encodes certain enzymes (biosynthetic) for tryptophan. This is expressed when the levels of tryptophan is low. An operon that encodes certain enzymes for the formation of amino acids and acts like a Trp operon, then, the amino acids will act like a corepressor. A corepressor is a small molecule that cooperates with the repressor protein for switching the operon off.

Option (C) is given as “the amino acid acts as a corepressor”.

“If a particular operon encodes certain enzymes for forming an amino acid and is regulated as Trp operon, then the amino acid will be acting like a corepressor molecule”, it is the right answer.

Hence, the option (C) is correct.

Reasons for the incorrect statements:

Option (A) is given as “the amino acid inactivates the repressor”.

The amino acid will be acting like a corepressor, hence it will not inactivate the repressor, and however it will react with the repressor. So, it is a wrong answer.

Option (B) is given as “the repressor is active in the absence amino acid”.

If the operon has to be kept ON, then the repressor will be inactive in the absence of amino acid. So, it is a wrong answer.

Option (D) is given as “the amino acid turns on the transcription of operon”.

The amino acid is not responsible for turning the transcription ON. So, it is a wrong answer.

Hence, options (A), (B), and (D) are incorrect.

Conclusion

The amino acid will be acting like a corepressor molecule as if a particular operon encodes certain enzymes for forming an amino acid and is regulated as the Trp operon.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 3

Textbook Question

Chapter 15, Problem 1TYU

If a particular operon encodes enzymes for making an essential amino acid and is regulated like the trp operon, then

A. the amino acid inactivates the repressor.
B. the repressor is active in the absence of the amino acid.
C. the amino acid acts as a corepressor.
D. the amino acid turns on transcription of the operon.

Expert Solution & Answer

Summary Introduction

Introduction:

Operon refers to the functional unit of the DNA (genomic). It consist of various genes that controls operon’s regulation. There are two types of operons; lac (lactose) and Trp (tryptophan).

Answer to Problem 1TYU

Correct answer:

If a particular operon encodes certain enzymes for forming an amino acid and is regulated as Trp operon, then the amino acid will be acting like a corepressor molecule. Therefore, option (C) is correct.

Explanation of Solution

Reason for the correct statement:

A Trp operon is a group of genes, which encodes certain enzymes (biosynthetic) for tryptophan. This is expressed when the levels of tryptophan is low. An operon that encodes certain enzymes for the formation of amino acids and acts like a Trp operon, then, the amino acids will act like a corepressor. A corepressor is a small molecule that cooperates with the repressor protein for switching the operon off.

Option (C) is given as “the amino acid acts as a corepressor”.

“If a particular operon encodes certain enzymes for forming an amino acid and is regulated as Trp operon, then the amino acid will be acting like a corepressor molecule”, it is the right answer.

Hence, the option (C) is correct.

Reasons for the incorrect statements:

Option (A) is given as “the amino acid inactivates the repressor”.

The amino acid will be acting like a corepressor, hence it will not inactivate the repressor, and however it will react with the repressor. So, it is a wrong answer.

Option (B) is given as “the repressor is active in the absence amino acid”.

If the operon has to be kept ON, then the repressor will be inactive in the absence of amino acid. So, it is a wrong answer.

Option (D) is given as “the amino acid turns on the transcription of operon”.

The amino acid is not responsible for turning the transcription ON. So, it is a wrong answer.

Hence, options (A), (B), and (D) are incorrect.

Conclusion

The amino acid will be acting like a corepressor molecule as if a particular operon encodes certain enzymes for forming an amino acid and is regulated as the Trp operon.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Textbook Question

Chapter 15, Problem 1TYU

If a particular operon encodes enzymes for making an essential amino acid and is regulated like the trp operon, then

A. the amino acid inactivates the repressor.
B. the repressor is active in the absence of the amino acid.
C. the amino acid acts as a corepressor.
D. the amino acid turns on transcription of the operon.

Expert Solution & Answer

Summary Introduction

Introduction:

Operon refers to the functional unit of the DNA (genomic). It consist of various genes that controls operon’s regulation. There are two types of operons; lac (lactose) and Trp (tryptophan).

Answer to Problem 1TYU

Correct answer:

If a particular operon encodes certain enzymes for forming an amino acid and is regulated as Trp operon, then the amino acid will be acting like a corepressor molecule. Therefore, option (C) is correct.

Explanation of Solution

Reason for the correct statement:

A Trp operon is a group of genes, which encodes certain enzymes (biosynthetic) for tryptophan. This is expressed when the levels of tryptophan is low. An operon that encodes certain enzymes for the formation of amino acids and acts like a Trp operon, then, the amino acids will act like a corepressor. A corepressor is a small molecule that cooperates with the repressor protein for switching the operon off.

Option (C) is given as “the amino acid acts as a corepressor”.

“If a particular operon encodes certain enzymes for forming an amino acid and is regulated as Trp operon, then the amino acid will be acting like a corepressor molecule”, it is the right answer.

Hence, the option (C) is correct.

Reasons for the incorrect statements:

Option (A) is given as “the amino acid inactivates the repressor”.

The amino acid will be acting like a corepressor, hence it will not inactivate the repressor, and however it will react with the repressor. So, it is a wrong answer.

Option (B) is given as “the repressor is active in the absence amino acid”.

If the operon has to be kept ON, then the repressor will be inactive in the absence of amino acid. So, it is a wrong answer.

Option (D) is given as “the amino acid turns on the transcription of operon”.

The amino acid is not responsible for turning the transcription ON. So, it is a wrong answer.

Hence, options (A), (B), and (D) are incorrect.

Conclusion

The amino acid will be acting like a corepressor molecule as if a particular operon encodes certain enzymes for forming an amino acid and is regulated as the Trp operon.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

Summary Introduction

Introduction:

Operon refers to the functional unit of the DNA (genomic). It consist of various genes that controls operon’s regulation. There are two types of operons; lac (lactose) and Trp (tryptophan).

Answer to Problem 1TYU

Correct answer:

If a particular operon encodes certain enzymes for forming an amino acid and is regulated as Trp operon, then the amino acid will be acting like a corepressor molecule. Therefore, option (C) is correct.

Explanation of Solution

Reason for the correct statement:

A Trp operon is a group of genes, which encodes certain enzymes (biosynthetic) for tryptophan. This is expressed when the levels of tryptophan is low. An operon that encodes certain enzymes for the formation of amino acids and acts like a Trp operon, then, the amino acids will act like a corepressor. A corepressor is a small molecule that cooperates with the repressor protein for switching the operon off.

Option (C) is given as “the amino acid acts as a corepressor”.

“If a particular operon encodes certain enzymes for forming an amino acid and is regulated as Trp operon, then the amino acid will be acting like a corepressor molecule”, it is the right answer.

Hence, the option (C) is correct.

Reasons for the incorrect statements:

Option (A) is given as “the amino acid inactivates the repressor”.

The amino acid will be acting like a corepressor, hence it will not inactivate the repressor, and however it will react with the repressor. So, it is a wrong answer.

Option (B) is given as “the repressor is active in the absence amino acid”.

If the operon has to be kept ON, then the repressor will be inactive in the absence of amino acid. So, it is a wrong answer.

Option (D) is given as “the amino acid turns on the transcription of operon”.

The amino acid is not responsible for turning the transcription ON. So, it is a wrong answer.

Hence, options (A), (B), and (D) are incorrect.

Conclusion

The amino acid will be acting like a corepressor molecule as if a particular operon encodes certain enzymes for forming an amino acid and is regulated as the Trp operon.

Answer 8

Expert Solution & Answer

Summary Introduction

Introduction:

Operon refers to the functional unit of the DNA (genomic). It consist of various genes that controls operon’s regulation. There are two types of operons; lac (lactose) and Trp (tryptophan).

Answer to Problem 1TYU

Correct answer:

If a particular operon encodes certain enzymes for forming an amino acid and is regulated as Trp operon, then the amino acid will be acting like a corepressor molecule. Therefore, option (C) is correct.

Explanation of Solution

Reason for the correct statement:

A Trp operon is a group of genes, which encodes certain enzymes (biosynthetic) for tryptophan. This is expressed when the levels of tryptophan is low. An operon that encodes certain enzymes for the formation of amino acids and acts like a Trp operon, then, the amino acids will act like a corepressor. A corepressor is a small molecule that cooperates with the repressor protein for switching the operon off.

Option (C) is given as “the amino acid acts as a corepressor”.

“If a particular operon encodes certain enzymes for forming an amino acid and is regulated as Trp operon, then the amino acid will be acting like a corepressor molecule”, it is the right answer.

Hence, the option (C) is correct.

Reasons for the incorrect statements:

Option (A) is given as “the amino acid inactivates the repressor”.

The amino acid will be acting like a corepressor, hence it will not inactivate the repressor, and however it will react with the repressor. So, it is a wrong answer.

Option (B) is given as “the repressor is active in the absence amino acid”.

If the operon has to be kept ON, then the repressor will be inactive in the absence of amino acid. So, it is a wrong answer.

Option (D) is given as “the amino acid turns on the transcription of operon”.

The amino acid is not responsible for turning the transcription ON. So, it is a wrong answer.

Hence, options (A), (B), and (D) are incorrect.

Conclusion

The amino acid will be acting like a corepressor molecule as if a particular operon encodes certain enzymes for forming an amino acid and is regulated as the Trp operon.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Summary Introduction

Introduction:

Operon refers to the functional unit of the DNA (genomic). It consist of various genes that controls operon’s regulation. There are two types of operons; lac (lactose) and Trp (tryptophan).

Answer 12

Answer to Problem 1TYU

Correct answer:

If a particular operon encodes certain enzymes for forming an amino acid and is regulated as Trp operon, then the amino acid will be acting like a corepressor molecule. Therefore, option (C) is correct.

Answer 13

Explanation of Solution

Reason for the correct statement:

A Trp operon is a group of genes, which encodes certain enzymes (biosynthetic) for tryptophan. This is expressed when the levels of tryptophan is low. An operon that encodes certain enzymes for the formation of amino acids and acts like a Trp operon, then, the amino acids will act like a corepressor. A corepressor is a small molecule that cooperates with the repressor protein for switching the operon off.

Option (C) is given as “the amino acid acts as a corepressor”.

“If a particular operon encodes certain enzymes for forming an amino acid and is regulated as Trp operon, then the amino acid will be acting like a corepressor molecule”, it is the right answer.

Hence, the option (C) is correct.

Reasons for the incorrect statements:

Option (A) is given as “the amino acid inactivates the repressor”.

The amino acid will be acting like a corepressor, hence it will not inactivate the repressor, and however it will react with the repressor. So, it is a wrong answer.

Option (B) is given as “the repressor is active in the absence amino acid”.

If the operon has to be kept ON, then the repressor will be inactive in the absence of amino acid. So, it is a wrong answer.

Option (D) is given as “the amino acid turns on the transcription of operon”.

The amino acid is not responsible for turning the transcription ON. So, it is a wrong answer.

Hence, options (A), (B), and (D) are incorrect.

Answer 14

Conclusion

The amino acid will be acting like a corepressor molecule as if a particular operon encodes certain enzymes for forming an amino acid and is regulated as the Trp operon.

Answer 15

Ch. 15.1 - How does binding of the trp corepressor to its...Ch. 15.1 - Describe the binding of RNA polymerase,...Ch. 15.1 - WHAT IF? A certain mutation in E. coli changes the...Ch. 15.2 - Prob. 1CC Ch. 15.2 - Compare the roles of general and specific...Ch. 15.2 - Prob. 3CC Ch. 15.3 - WHAT IF? Suppose the mRNA being degraded in Figure...Ch. 15.3 - MAKE CONNECTIONS Inactivation of one of the X...Ch. 15.4 - Prob. 1CC Ch. 15.4 - WHAT IF? Study the microarray in Figure 15.17. If...

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Answer to Problem 1TYU

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