Whether it is advantageous if the regulatory gene that codes for the tryptophan repressor is tightly linked to the trp operon. Introduction: Gene regulation consists of many mechanisms that the cell uses to decrease or increase the production of certain gene products. The gene regulation in the bacteria mainly takes place in the level of transcription. In the eukaryotes, the gene regulation takes place in the level of transcription, post transcription, translation, and post translation.

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Answer 1

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Chapter 14, Problem 15TYU

Summary Introduction

To determine: Whether it is advantageous if the regulatory gene that codes for the tryptophan repressor is tightly linked to the trp operon.

Introduction: Gene regulation consists of many mechanisms that the cell uses to decrease or increase the production of certain gene products. The gene regulation in the bacteria mainly takes place in the level of transcription. In the eukaryotes, the gene regulation takes place in the level of transcription, post transcription, translation, and post translation.

Summary Introduction

To explain: The reason why there is no advantage if the regulatory gene that codes for the tryptophan repressor is tightly linked to the trp operon.

Introduction: Gene regulation consists of many mechanisms that the cell uses to decrease or increase the production of certain gene products. The gene regulation in the bacteria mainly takes place in the level of transcription. In the eukaryotes, the gene regulation takes place in the level of transcription, post transcription, translation, and post translation.

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What would happen if the operator sequence of the trp operon contained a mutation that prevented the repressor protein from binding to the operator? (Explain what would happen in both the presence and absence of tryptophan)

You can determine the regulation of an unknown operon based on descriptions like those in the table below. For each row, choose whether the fact would suggest positive or negative or inducible or repressible regulation and indicate your answer with an X in the column. Only one X should appear in each row. In the presence of the signal, the structural genes are expressed. In the presence of the signal, the structural genes are not expressed. In the absence of the signal, the structural genes are expressed. In the absence of the signal, the structural genes are not expressed. The binding of the regulatory protein to the operon results in structural gene expression. The binding of the regulatory protein to the operon prevents structural gene expression. A mutation in the regulatory protein results in constitutive expression of the structural genes. A mutation in the regulatory protein results in no or low expression of the structural genes. Positive? Negative? Inducible? Repressible?

Describe how the components of the trp operon system are affected by a mutation in trpC? Why is it that once enviornmental tryptophan is inserted into the cell, only the trp repressor is activated (turned on)?

Answer 2

Question

Chapter 14, Problem 15TYU

Summary Introduction

To determine: Whether it is advantageous if the regulatory gene that codes for the tryptophan repressor is tightly linked to the trp operon.

Introduction: Gene regulation consists of many mechanisms that the cell uses to decrease or increase the production of certain gene products. The gene regulation in the bacteria mainly takes place in the level of transcription. In the eukaryotes, the gene regulation takes place in the level of transcription, post transcription, translation, and post translation.

Summary Introduction

To explain: The reason why there is no advantage if the regulatory gene that codes for the tryptophan repressor is tightly linked to the trp operon.

Introduction: Gene regulation consists of many mechanisms that the cell uses to decrease or increase the production of certain gene products. The gene regulation in the bacteria mainly takes place in the level of transcription. In the eukaryotes, the gene regulation takes place in the level of transcription, post transcription, translation, and post translation.

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Answer 3

Question

Chapter 14, Problem 15TYU

Summary Introduction

To determine: Whether it is advantageous if the regulatory gene that codes for the tryptophan repressor is tightly linked to the trp operon.

Introduction: Gene regulation consists of many mechanisms that the cell uses to decrease or increase the production of certain gene products. The gene regulation in the bacteria mainly takes place in the level of transcription. In the eukaryotes, the gene regulation takes place in the level of transcription, post transcription, translation, and post translation.

Summary Introduction

To explain: The reason why there is no advantage if the regulatory gene that codes for the tryptophan repressor is tightly linked to the trp operon.

Introduction: Gene regulation consists of many mechanisms that the cell uses to decrease or increase the production of certain gene products. The gene regulation in the bacteria mainly takes place in the level of transcription. In the eukaryotes, the gene regulation takes place in the level of transcription, post transcription, translation, and post translation.

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Answer 4

Question

Chapter 14, Problem 15TYU

Summary Introduction

To determine: Whether it is advantageous if the regulatory gene that codes for the tryptophan repressor is tightly linked to the trp operon.

Introduction: Gene regulation consists of many mechanisms that the cell uses to decrease or increase the production of certain gene products. The gene regulation in the bacteria mainly takes place in the level of transcription. In the eukaryotes, the gene regulation takes place in the level of transcription, post transcription, translation, and post translation.

Summary Introduction

To explain: The reason why there is no advantage if the regulatory gene that codes for the tryptophan repressor is tightly linked to the trp operon.

Introduction: Gene regulation consists of many mechanisms that the cell uses to decrease or increase the production of certain gene products. The gene regulation in the bacteria mainly takes place in the level of transcription. In the eukaryotes, the gene regulation takes place in the level of transcription, post transcription, translation, and post translation.

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Answer 5

Chapter 14, Problem 15TYU

Summary Introduction

To determine: Whether it is advantageous if the regulatory gene that codes for the tryptophan repressor is tightly linked to the trp operon.

Introduction: Gene regulation consists of many mechanisms that the cell uses to decrease or increase the production of certain gene products. The gene regulation in the bacteria mainly takes place in the level of transcription. In the eukaryotes, the gene regulation takes place in the level of transcription, post transcription, translation, and post translation.

Summary Introduction

To explain: The reason why there is no advantage if the regulatory gene that codes for the tryptophan repressor is tightly linked to the trp operon.

Introduction: Gene regulation consists of many mechanisms that the cell uses to decrease or increase the production of certain gene products. The gene regulation in the bacteria mainly takes place in the level of transcription. In the eukaryotes, the gene regulation takes place in the level of transcription, post transcription, translation, and post translation.

Answer 6

Chapter 14, Problem 15TYU

Summary Introduction

To determine: Whether it is advantageous if the regulatory gene that codes for the tryptophan repressor is tightly linked to the trp operon.

Introduction: Gene regulation consists of many mechanisms that the cell uses to decrease or increase the production of certain gene products. The gene regulation in the bacteria mainly takes place in the level of transcription. In the eukaryotes, the gene regulation takes place in the level of transcription, post transcription, translation, and post translation.

Answer 7

Chapter 14, Problem 15TYU

Summary Introduction

To determine: Whether it is advantageous if the regulatory gene that codes for the tryptophan repressor is tightly linked to the trp operon.

Introduction: Gene regulation consists of many mechanisms that the cell uses to decrease or increase the production of certain gene products. The gene regulation in the bacteria mainly takes place in the level of transcription. In the eukaryotes, the gene regulation takes place in the level of transcription, post transcription, translation, and post translation.

Answer 8

Summary Introduction

To explain: The reason why there is no advantage if the regulatory gene that codes for the tryptophan repressor is tightly linked to the trp operon.

Introduction: Gene regulation consists of many mechanisms that the cell uses to decrease or increase the production of certain gene products. The gene regulation in the bacteria mainly takes place in the level of transcription. In the eukaryotes, the gene regulation takes place in the level of transcription, post transcription, translation, and post translation.

Answer 9

Summary Introduction

To explain: The reason why there is no advantage if the regulatory gene that codes for the tryptophan repressor is tightly linked to the trp operon.

Introduction: Gene regulation consists of many mechanisms that the cell uses to decrease or increase the production of certain gene products. The gene regulation in the bacteria mainly takes place in the level of transcription. In the eukaryotes, the gene regulation takes place in the level of transcription, post transcription, translation, and post translation.

Answer 10

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Answer 13

Ch. 14.1 - Explain why bacterial and eukaryotic cells have...Ch. 14.1 - Prob. 1C Ch. 14.1 - Prob. 2C Ch. 14.2 - Prob. 2LO Ch. 14.2 - Distinguish among inducible, repressible, and...Ch. 14.2 - Differentiate between positive and negative...Ch. 14.2 - Prob. 5LO Ch. 14.2 - Prob. 1C Ch. 14.2 - What structural features does the trp operon share...Ch. 14.2 - Prob. 3C

Solution Summary: The author explains that the regulatory gene that codes for the tryptophan repressor is not tightly connected to the trp operon.

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