Question 1

What kind of gene has a product that interacts with other nucleotide sequences,affecting their transcription or translation?

Accepted Answer

A) constitutive gene 
B) regulatory gene 
C) structural gene 
D) none of the above 
A) constitutive gene 
B) regulatory gene 
C) structural gene 
D) none of the above B

Question 2

Which of the following chromatin changes will repress gene transcription?

Accepted Answer

A) histone acetylation 
B) chromatin-remodeling complexes that reposition nucleosomes 
C) DNA not methylated 
D) all of the above 
A) histone acetylation 
B) chromatin-remodeling complexes that reposition nucleosomes 
C) DNA not methylated 
D) all of the above C

Question 3

To activate the transcription of permease and the whole lac operonlactose needs to be present in the cell.How can lactose get in the cell when the permease gene is not activated?

Accepted Answer

A) The repressed lac operon is never completely repressed. 
B) There is a second permease in the genome that initially transports lactose. 
C) Lactose freely moves across the plasma membrane. 
D) Though the lac operon has been studied for many years,this mystery is unsolved. 
A) The repressed lac operon is never completely repressed. 
B) There is a second permease in the genome that initially transports lactose. 
C) Lactose freely moves across the plasma membrane. 
D) Though the lac operon has been studied for many years,this mystery is unsolved. A

Question 4

Regulation of gene activity can occur at several stages,such as _________.

Accepted Answer

A) transcription 
B) translation 
C) posttranslational modification 
D) mRNA processing and stability 
E) all of the above 
A) transcription 
B) translation 
C) posttranslational modification 
D) mRNA processing and stability 
E) all of the above

Question 5

The trp operon repressor has two binding sites.In sequential order,what two things bind the repressor?

Accepted Answer

A) DNA,tryptophan 
B) first DNA site,second DNA site 
C) first trptophan molecule,second tryptophan molecule 
D) tryptophan,DNA 
A) DNA,tryptophan 
B) first DNA site,second DNA site 
C) first trptophan molecule,second tryptophan molecule 
D) tryptophan,DNA

Question 6

A typical operon contains several regions.Which region is where a regulator protein binds?

Accepted Answer

A) structural genes 
B) promoter 
C) operator 
D) none of the above 
A) structural genes 
B) promoter 
C) operator 
D) none of the above

Question 7

Which of the following is true of transcriptional activator proteins?

Accepted Answer

A) They destabilize the basal transcription apparatus. 
B) Some have acetyltransferase activity. 
C) They do not bind promoter sequences. 
D) All of the above are true. 
A) They destabilize the basal transcription apparatus. 
B) Some have acetyltransferase activity. 
C) They do not bind promoter sequences. 
D) All of the above are true.

Question 8

An__________ operon is normally turned on,and it is turned off by an_________.

Accepted Answer

A) inducible; activator 
B) inducible; repressor 
C) repressible; activator 
D) repressible; repressor 
A) inducible; activator 
B) inducible; repressor 
C) repressible; activator 
D) repressible; repressor

Question 9

siRNA and miRNA inhibit gene expression by all of the following EXCEPT

Accepted Answer

A) cleaving mRNA 
B) altering chromatin structure 
C) stimulating RNA degradation 
D) stabilizing translation machinery 
E) all of the above 
A) cleaving mRNA 
B) altering chromatin structure 
C) stimulating RNA degradation 
D) stabilizing translation machinery 
E) all of the above

Question 10

What is the role of insulators?

Accepted Answer

A) They maintain nucleosome structures. 
B) They recruit transcriptional activator proteins. 
C) They recruit the basal transcription apparatus. 
D) They block the role of enhancers. 
E) All of the above are true. 
A) They maintain nucleosome structures. 
B) They recruit transcriptional activator proteins. 
C) They recruit the basal transcription apparatus. 
D) They block the role of enhancers. 
E) All of the above are true.

What kind of gene has a product that interacts with other nucleotide sequences,affecting their transcription or translation?

Which of the following chromatin changes will repress gene transcription?

To activate the transcription of permease and the whole lac operonlactose needs to be present in the cell.How can lactose get in the cell when the permease gene is not activated?

Regulation of gene activity can occur at several stages,such as _________.

The trp operon repressor has two binding sites.In sequential order,what two things bind the repressor?

A typical operon contains several regions.Which region is where a regulator protein binds?

Which of the following is true of transcriptional activator proteins?

An__ operon is normally turned on,and it is turned off by an_.

siRNA and miRNA inhibit gene expression by all of the following EXCEPT

What is the role of insulators?

Introduction to Genetics

Chromosomes and Cellular Reproduction

Basic Principles of Heredity

Extensions and Modifications of Basic Principles

Linkage, Recombination, and Eukaryotic Gene Mapping

Bacterial and Viral Genetic Systems

Chromosome Variation

DNA: The Chemical Nature of the Gene

DNA Replication

From DNA to Proteins: Transcription and Rna Processing

From DNA to Proteins: Translation

Gene Mutations, Transposable Elements, and Dna Repair

Molecular Genetic Analysis, Biotechnology, and Genomics

Cancer Genetics

Quantitative Genetics

Population and Evolutionary Genetics

Filters

Exam 12: Control of Gene Expression

What kind of gene has a product that interacts with other nucleotide sequences,affecting their transcription or translation?

Which of the following chromatin changes will repress gene transcription?

To activate the transcription of permease and the whole lac operonlactose needs to be present in the cell.How can lactose get in the cell when the permease gene is not activated?

Regulation of gene activity can occur at several stages,such as _________.

The trp operon repressor has two binding sites.In sequential order,what two things bind the repressor?

A typical operon contains several regions.Which region is where a regulator protein binds?

Which of the following is true of transcriptional activator proteins?

An__________ operon is normally turned on,and it is turned off by an_________.

siRNA and miRNA inhibit gene expression by all of the following EXCEPT

What is the role of insulators?

Introduction to Genetics

Chromosomes and Cellular Reproduction

Basic Principles of Heredity

Extensions and Modifications of Basic Principles

Linkage, Recombination, and Eukaryotic Gene Mapping

Bacterial and Viral Genetic Systems

Chromosome Variation

DNA: The Chemical Nature of the Gene

DNA Replication

From DNA to Proteins: Transcription and Rna Processing

From DNA to Proteins: Translation

Gene Mutations, Transposable Elements, and Dna Repair

Molecular Genetic Analysis, Biotechnology, and Genomics

Cancer Genetics

Quantitative Genetics

Population and Evolutionary Genetics

Filters

An__ operon is normally turned on,and it is turned off by an_.