The phenotype of a repressor mutation which prevents DNA binding. Introduction: A repressor molecule or protein prevents the RNA polymerase from binding to the promoter region and thus, prevents the expression of genes.

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Answer 1

Question

Chapter 16, Problem 1DA

Summary Introduction

To determine: The phenotype of a repressor mutation which prevents DNA binding.

Introduction: A repressor molecule or protein prevents the RNA polymerase from binding to the promoter region and thus, prevents the expression of genes.

Expert Solution

Explanation of Solution

The phenotype of a repressor mutation in which binding of DNA is prevented would be the expression of the genes which facilitate lactose metabolism. This is because the operator would not be able to bind to the repressor and transcription would get inhibited.

Summary Introduction

To determine: The phenotype of a repressor mutation that prevents DNA binding and an operator mutation that prevents repressor binding.

Introduction: In molecular biology, operator is a genetic sequence which is responsible for facilitating the transcribing proteins to bind to the DNA sequence being transcribed.

Expert Solution

Explanation of Solution

Mutation in the operator or inducer that prevents the binding of the repressor would allow the operator to bing to the DNA all the time and the genes for lactose metabolism would not get expressed. This is because the RNA polymerase would bind to the DNA and transcription would proceed. This is in contrast to the phenotype expressed when mutation in the repressor would prevent transcription.

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Students have asked these similar questions

What is the effect of an increased Cro concentration on the expression of the gene for the λ repressor? Of an increased concentration of λ repressor on the expression of the Cro gene? Of an increased concentration of λ repressor on the expression of the λ repressor gene?

Which of the following is the most likely result of a mutation in the lac operator that prevents release of the depressor protein? Choose 1 answer: (A)The lactose permease protein will be produced, even in the absence of lactose. (B) Transcription of the structural genes will be blocked, even in the presence of lactose. (C) The catabolite activator protein will be bound to the CAP site, even in the presence of glucose. (D) Expression of the lacI gene will be repressed, even in the absence of glucose.

What are the functions of transcriptional activator proteins and repressor proteins? Explain how they work at the molecular level.

Answer 2

Question

Chapter 16, Problem 1DA

Summary Introduction

To determine: The phenotype of a repressor mutation which prevents DNA binding.

Introduction: A repressor molecule or protein prevents the RNA polymerase from binding to the promoter region and thus, prevents the expression of genes.

Expert Solution

Explanation of Solution

The phenotype of a repressor mutation in which binding of DNA is prevented would be the expression of the genes which facilitate lactose metabolism. This is because the operator would not be able to bind to the repressor and transcription would get inhibited.

Summary Introduction

To determine: The phenotype of a repressor mutation that prevents DNA binding and an operator mutation that prevents repressor binding.

Introduction: In molecular biology, operator is a genetic sequence which is responsible for facilitating the transcribing proteins to bind to the DNA sequence being transcribed.

Expert Solution

Explanation of Solution

Mutation in the operator or inducer that prevents the binding of the repressor would allow the operator to bing to the DNA all the time and the genes for lactose metabolism would not get expressed. This is because the RNA polymerase would bind to the DNA and transcription would proceed. This is in contrast to the phenotype expressed when mutation in the repressor would prevent transcription.

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Answer 3

Question

Chapter 16, Problem 1DA

Summary Introduction

To determine: The phenotype of a repressor mutation which prevents DNA binding.

Introduction: A repressor molecule or protein prevents the RNA polymerase from binding to the promoter region and thus, prevents the expression of genes.

Expert Solution

Explanation of Solution

The phenotype of a repressor mutation in which binding of DNA is prevented would be the expression of the genes which facilitate lactose metabolism. This is because the operator would not be able to bind to the repressor and transcription would get inhibited.

Summary Introduction

To determine: The phenotype of a repressor mutation that prevents DNA binding and an operator mutation that prevents repressor binding.

Introduction: In molecular biology, operator is a genetic sequence which is responsible for facilitating the transcribing proteins to bind to the DNA sequence being transcribed.

Expert Solution

Explanation of Solution

Mutation in the operator or inducer that prevents the binding of the repressor would allow the operator to bing to the DNA all the time and the genes for lactose metabolism would not get expressed. This is because the RNA polymerase would bind to the DNA and transcription would proceed. This is in contrast to the phenotype expressed when mutation in the repressor would prevent transcription.

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

Answer 4

Question

Chapter 16, Problem 1DA

Summary Introduction

To determine: The phenotype of a repressor mutation which prevents DNA binding.

Introduction: A repressor molecule or protein prevents the RNA polymerase from binding to the promoter region and thus, prevents the expression of genes.

Expert Solution

Explanation of Solution

The phenotype of a repressor mutation in which binding of DNA is prevented would be the expression of the genes which facilitate lactose metabolism. This is because the operator would not be able to bind to the repressor and transcription would get inhibited.

Summary Introduction

To determine: The phenotype of a repressor mutation that prevents DNA binding and an operator mutation that prevents repressor binding.

Introduction: In molecular biology, operator is a genetic sequence which is responsible for facilitating the transcribing proteins to bind to the DNA sequence being transcribed.

Expert Solution

Explanation of Solution

Mutation in the operator or inducer that prevents the binding of the repressor would allow the operator to bing to the DNA all the time and the genes for lactose metabolism would not get expressed. This is because the RNA polymerase would bind to the DNA and transcription would proceed. This is in contrast to the phenotype expressed when mutation in the repressor would prevent transcription.

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Answer 5

Chapter 16, Problem 1DA

Summary Introduction

To determine: The phenotype of a repressor mutation which prevents DNA binding.

Introduction: A repressor molecule or protein prevents the RNA polymerase from binding to the promoter region and thus, prevents the expression of genes.

Expert Solution

Explanation of Solution

The phenotype of a repressor mutation in which binding of DNA is prevented would be the expression of the genes which facilitate lactose metabolism. This is because the operator would not be able to bind to the repressor and transcription would get inhibited.

Summary Introduction

To determine: The phenotype of a repressor mutation that prevents DNA binding and an operator mutation that prevents repressor binding.

Introduction: In molecular biology, operator is a genetic sequence which is responsible for facilitating the transcribing proteins to bind to the DNA sequence being transcribed.

Expert Solution

Explanation of Solution

Mutation in the operator or inducer that prevents the binding of the repressor would allow the operator to bing to the DNA all the time and the genes for lactose metabolism would not get expressed. This is because the RNA polymerase would bind to the DNA and transcription would proceed. This is in contrast to the phenotype expressed when mutation in the repressor would prevent transcription.

Answer 6

Chapter 16, Problem 1DA

Summary Introduction

To determine: The phenotype of a repressor mutation which prevents DNA binding.

Introduction: A repressor molecule or protein prevents the RNA polymerase from binding to the promoter region and thus, prevents the expression of genes.

Expert Solution

Explanation of Solution

The phenotype of a repressor mutation in which binding of DNA is prevented would be the expression of the genes which facilitate lactose metabolism. This is because the operator would not be able to bind to the repressor and transcription would get inhibited.

Answer 7

Chapter 16, Problem 1DA

Summary Introduction

To determine: The phenotype of a repressor mutation which prevents DNA binding.

Introduction: A repressor molecule or protein prevents the RNA polymerase from binding to the promoter region and thus, prevents the expression of genes.

Answer 8

Expert Solution

Explanation of Solution

The phenotype of a repressor mutation in which binding of DNA is prevented would be the expression of the genes which facilitate lactose metabolism. This is because the operator would not be able to bind to the repressor and transcription would get inhibited.

Answer 9

Expert Solution

Answer 10

Expert Solution

Answer 11

Expert Solution

Answer 12

Summary Introduction

To determine: The phenotype of a repressor mutation that prevents DNA binding and an operator mutation that prevents repressor binding.

Introduction: In molecular biology, operator is a genetic sequence which is responsible for facilitating the transcribing proteins to bind to the DNA sequence being transcribed.

Expert Solution

Explanation of Solution

Mutation in the operator or inducer that prevents the binding of the repressor would allow the operator to bing to the DNA all the time and the genes for lactose metabolism would not get expressed. This is because the RNA polymerase would bind to the DNA and transcription would proceed. This is in contrast to the phenotype expressed when mutation in the repressor would prevent transcription.

Answer 13

Summary Introduction

To determine: The phenotype of a repressor mutation that prevents DNA binding and an operator mutation that prevents repressor binding.

Introduction: In molecular biology, operator is a genetic sequence which is responsible for facilitating the transcribing proteins to bind to the DNA sequence being transcribed.

Answer 14

Expert Solution

Explanation of Solution

Mutation in the operator or inducer that prevents the binding of the repressor would allow the operator to bing to the DNA all the time and the genes for lactose metabolism would not get expressed. This is because the RNA polymerase would bind to the DNA and transcription would proceed. This is in contrast to the phenotype expressed when mutation in the repressor would prevent transcription.