Question 1

Which of the following is true about the early phase of T7 infection of bacteria?

Accepted Answer

A) Class II genes are the first to be transcribed. 
B) The host polymerase transcribes class II genes. 
C) The phage-encoded polymerase transcribes the class I phage genes. 
D) Class I genes are the first to be transcribed. 
E) All of the choices are correct. 
A) Class II genes are the first to be transcribed. 
B) The host polymerase transcribes class II genes. 
C) The phage-encoded polymerase transcribes the class I phage genes. 
D) Class I genes are the first to be transcribed. 
E) All of the choices are correct.

Question 2

During an experiment to study the rate of infection of bacteria with T4,the bacterial cultures were accidentally exposed to a UV light source.Which of the following would be expected for this exposure?

Accepted Answer

A) recA gene is turned off. 
B) Coprotease activity in RecA protein is activated. 
C) SOS response is induced. 
D) Coprotease activity in RecA protein is activated and SOS response is induced are correct. 
E) recA gene is turned off and coprotease activity in RecA protein is activated are correct. 
A) recA gene is turned off. 
B) Coprotease activity in RecA protein is activated. 
C) SOS response is induced. 
D) Coprotease activity in RecA protein is activated and SOS response is induced are correct. 
E) recA gene is turned off and coprotease activity in RecA protein is activated are correct.

Question 3

Which of the following sigma specificity factors is involved in middle gene transcription during SPO1 phage infection of bacteria?

Accepted Answer

A) gp33 
B) gp28 
C) gp34 
D) gp43 
E) host sigma 
A) gp33 
B) gp28 
C) gp34 
D) gp43 
E) host sigma

Question 4

Which of the following explains the events in late stage T4 infection in bacteria?

Accepted Answer

A) The host sigma factor specifies transcription of genes. 
B) There is a high level of transcription of host genes. 
C) Host polymerase holoenzyme directs transcription. 
D) The host core enzyme participates in transcription conjunction with phage-encoded specificity factors. 
E) All of the choices are correct. 
A) The host sigma factor specifies transcription of genes. 
B) There is a high level of transcription of host genes. 
C) Host polymerase holoenzyme directs transcription. 
D) The host core enzyme participates in transcription conjunction with phage-encoded specificity factors. 
E) All of the choices are correct.

Question 5

Lysogeny is established in the production of sufficient repressor to bind to early operators and prevent further early gene synthesis.

Accepted Answer

A) True 
 B)False

Question 6

Transcriptional changes that occur when organisms respond to environmental changes are in part due to changes in RNA polymerase.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following conditions does not lead to a change in gene expression patterns in bacterial cells?

Accepted Answer

A) sporulation 
B) heat shock 
C) nutrient availability 
D) nitrogen deprivation 
E) none of the choices are correct. 
A) sporulation 
B) heat shock 
C) nutrient availability 
D) nitrogen deprivation 
E) none of the choices are correct.

Question 8

Transcription in eukaryotes is mediated by sigma factors.

Accepted Answer

A) True 
 B)False

Which of the following is true about the early phase of T7 infection of bacteria?

During an experiment to study the rate of infection of bacteria with T4,the bacterial cultures were accidentally exposed to a UV light source.Which of the following would be expected for this exposure?

Which of the following sigma specificity factors is involved in middle gene transcription during SPO1 phage infection of bacteria?

Which of the following explains the events in late stage T4 infection in bacteria?

Lysogeny is established in the production of sufficient repressor to bind to early operators and prevent further early gene synthesis.

Transcriptional changes that occur when organisms respond to environmental changes are in part due to changes in RNA polymerase.

Which of the following conditions does not lead to a change in gene expression patterns in bacterial cells?

Transcription in eukaryotes is mediated by sigma factors.

A Brief History

The Molecular Nature of Genes

An Introduction to Gene Function

Molecular Cloning Methods

Molecular Tools for Studying Genes and Gene Activity

The Mechanism of Transcription in Bacteria

Operons: Fine Control of Bacterial Transcription

Dna-Protein Interactions in Bacteria

Eukaryotic Rna Polymerases and Their Promoters

General Transcription Factors in Eukaryotes

Transcription Activators in Eukaryotes

Chromatin Structure and Its Effect on Transcription

Rna Processing I: Splicing

Rna Processing II: Capping and Polyadenylation

Rna Processing: Other Post-Transcriptional Events

The Mechanism of Translation I: Initiation

The Mechanism of Translation II: Elongation and Termination

Ribosomes and Transfer Rna

Dna Replication,damage and Repair

Dna Replication II: Detailed Mechanism

Homologous Recombination

Transposition

Introduction to Genomics: Dna Sequencing on a Genomic Scale

Genomics II: Functional Genomics,proteomics and Bioinformatics

Filters

Exam 8: Major Shifts in Bacterial Transcription

Which of the following is true about the early phase of T7 infection of bacteria?

During an experiment to study the rate of infection of bacteria with T4,the bacterial cultures were accidentally exposed to a UV light source.Which of the following would be expected for this exposure?

Which of the following sigma specificity factors is involved in middle gene transcription during SPO1 phage infection of bacteria?

Which of the following explains the events in late stage T4 infection in bacteria?

Lysogeny is established in the production of sufficient repressor to bind to early operators and prevent further early gene synthesis.

Transcriptional changes that occur when organisms respond to environmental changes are in part due to changes in RNA polymerase.

Which of the following conditions does not lead to a change in gene expression patterns in bacterial cells?

Transcription in eukaryotes is mediated by sigma factors.

A Brief History

The Molecular Nature of Genes

An Introduction to Gene Function

Molecular Cloning Methods

Molecular Tools for Studying Genes and Gene Activity

The Mechanism of Transcription in Bacteria

Operons: Fine Control of Bacterial Transcription

Dna-Protein Interactions in Bacteria

Eukaryotic Rna Polymerases and Their Promoters

General Transcription Factors in Eukaryotes

Transcription Activators in Eukaryotes

Chromatin Structure and Its Effect on Transcription

Rna Processing I: Splicing

Rna Processing II: Capping and Polyadenylation

Rna Processing: Other Post-Transcriptional Events

The Mechanism of Translation I: Initiation

The Mechanism of Translation II: Elongation and Termination

Ribosomes and Transfer Rna

Dna Replication,damage and Repair

Dna Replication II: Detailed Mechanism

Homologous Recombination

Transposition

Introduction to Genomics: Dna Sequencing on a Genomic Scale

Genomics II: Functional Genomics,proteomics and Bioinformatics

Filters