Question 1

Enzymes that alter another protein or enzyme's activity by attaching a phosphate group are called:

Accepted Answer

A)   kinases
B)   phosphatases
C)   phosphators
D)   transcription factors
E)   coenzymesF) B) and E)
G) A) and B)

Question 2

Some eukaryotic DNA sequences act as introns in the cells of some tissues and exons in the cells of other tissues. This is an example of ____, and allows for ____.

Accepted Answer

A)   positive control; feedback inhibition
B)   gene amplification; the regulation of the rate of transcription
C)   alternative splicing; the formation of different types of closely related proteins
D)   DNA methylation; the formation of different types of closely related proteins
E)   DNA replication; heterodimer formationF) None of the above
G) A) and E)

Question 3

Temporal gene regulation refers to which of the following circumstances?

Accepted Answer

A)   Certain genes are induced only at a particular point in the organism's life cycle.
B)   Certain genes are induced only in specific tissues.
C)   Heat-shock genes are induced during periods of temperature stress.
D)   "Housekeeping" genes are induced in response to a viral infection.
E)   Molecular chaperones are synthesized after heavy-metal ingestion.F) D) and E)
G) B) and E)

Question 4

Figure 14-1

The promoter in the accompanying figure is labeled as ____.

Accepted Answer

A)   6
B)   3
C)   1
D)   2
E)   7F) A) and E)
G) B) and E)

Question 5

How does the lactose repressor block transcription of the lactose operon?

Accepted Answer

A)   by "turning off" the lacA intron
B)   by degrading the lacZ protein product
C)   by binding allosterically to the lacZ gene
D)   by slowing the uptake of lactose into the cell
E)   by binding to the operatorF) A) and D)
G) A) and C)

Question 6

Sketch the main elements of an inducible operon, such as the lactose operon, and explain the functions of the operator and promoter regions.

Accepted Answer

Concepts to Consider: An operon is a set...

Question 7

The organization of the lac operon, from upstream to downstream sequences, is represented by:

Accepted Answer

A)   repressor gene -> lacZ -> lacY -> lac A
B)   lacZ -> lacY -> lac A
C)   lacZ -> lacY -> lac A -> operator -> promoter
D)   operator -> promoter -> lacZ -> lacY -> lac A
E)   promoter -> operator -> lacZ -> lacY -> lac AF) None of the above
G) B) and E)

Question 8

A repressible operon is usually controlled by:

Accepted Answer

A)   an inactive repressor that allows it to be in the "on" state
B)   the supply of the precursor product for the enzymes
C)   an inactive repressor that keeps it in the "off" state
D)   tryptophan
E)   being turned "on," usually by the end product of the pathwayF) B) and D)
G) B) and C)

Question 9

Match between columns
                        Premises: alternative splicing

Accepted Answer

The Answer of regulation of transcription and regulation of translation is...

Question 10

Many genes encode proteins that are always needed by a cell, and therefore are always expressed. Such genes are known as:

Accepted Answer

A)   repressible
B)   promoter
C)   constitutive
D)   inducible
E)   operonsF) B) and E)
G) B) and D)

Question 11

Long coding RNAs (lnc RNAs)  are characterized by:

Accepted Answer

A)   the presence of introns
B)   the lack of a polyA tail
C)   their roles in regulating transcription
D)   being less than 100 bases in length
E)   binding to zinc finger transcription factorsF) A) and B)
G) A) and C)

Question 12

A TATA box is seen in ____ cells and is the site where ____.

Accepted Answer

A)   prokaryotic; RNA polymerase binds
B)   eukaryotic; DNA ligase cleaves introns
C)   eukaryotic; RNA polymerase binds
D)   both prokaryotic and eukaryotic; transcription factors bind
E)   prokaryotic; a repressor protein bindsF) A) and B)
G) A) and C)

Question 13

The general transcriptional machinery is composed of the regulatory proteins bound to the promoter of a eukaryotic gene.

Accepted Answer

A) True 
 B)False

Question 14

Figure 14-1

Refer to the accompanying figure. The structure labeled as 7 in the figure of the tryptophan operon is a(n) :

Accepted Answer

A)   active repressor protein
B)   inactive repressor protein
C)   active RNA polymerase
D)   inactive RNA polymerase
E)   ribosomeF) A) and B)
G) All of the above

Question 15

An activator protein would have which of the following effects on an operon with a positive control mechanism?

Accepted Answer

A)   stimulate transcription
B)   turn off transcription
C)   stimulate transcription when a coactivator is bound to the allosteric site
D)   inhibit transcription when a coactivator is bound to the allosteric site
E)   activator proteins only work on operons under negative controlF) A) and E)
G) A) and B)

Question 16

Match between columns
                        Premises: addition of phosphate groups by kinase enzymes

Accepted Answer

The Answer of protein degradation and proteolytic processing and chemical is...

Question 17

Explain genomic imprinting and how the phenotype can vary based on paternal or maternal inheritance of a particular allele.

Accepted Answer

Concepts to consider: While most genomic...

Question 18

Constitutive genes code for proteins that are needed for survival.

Accepted Answer

A) True 
 B)False

Question 19

Some transcription factors, such as leucine zipper proteins, form homodimers or heterodimers. How does this increase the complexity of available strategies of gene regulation?

Accepted Answer

The example given in the text proposes t...

Question 20

Bacteria can respond quickly to their surroundings, such as in the presence of an abundant food source. This is because:

Accepted Answer

A)   genes for functionally related enzymes are regulated together in operons.
B)   genes for functionally related enzymes are always constitutive.
C)   genes for functionally related enzymes are always under positive control.
D)   efficient protein degradation removes unneeded proteins quickly.
E)   all bacterial genes are constitutive.F) B) and C)
G) C) and E)

Exam 14: Gene Regulation

The general transcriptional machinery is composed of the regulatory proteins bound to the promoter of a eukaryotic gene.

Correct Answer
verified

The organization of the lac operon, from upstream to downstream sequences, is represented by:

Correct Answer
verified

Bacteria can respond quickly to their surroundings, such as in the presence of an abundant food source. This is because:

Correct Answer
verified

Long coding RNAs (lnc RNAs) are characterized by:

Correct Answer
verified

A repressible operon is usually controlled by:

Correct Answer
verified

Temporal gene regulation refers to which of the following circumstances?

Correct Answer
verified

Sketch the main elements of an inducible operon, such as the lactose operon, and explain the functions of the operator and promoter regions.

Correct Answer
verified
Concepts to Consider: An operon is a set...
View Answer

Match the type of gene regulation with the process.

Many genes encode proteins that are always needed by a cell, and therefore are always expressed. Such genes are known as:

Correct Answer
verified

Some eukaryotic DNA sequences act as introns in the cells of some tissues and exons in the cells of other tissues. This is an example of , and allows for .

Correct Answer
verified

How does the lactose repressor block transcription of the lactose operon?

Correct Answer
verified

A TATA box is seen in cells and is the site where .

Correct Answer
verified

Enzymes that alter another protein or enzyme's activity by attaching a phosphate group are called:

Correct Answer
verified

An activator protein would have which of the following effects on an operon with a positive control mechanism?

Correct Answer
verified

Some transcription factors, such as leucine zipper proteins, form homodimers or heterodimers. How does this increase the complexity of available strategies of gene regulation?

Correct Answer
verified
The example given in the text proposes t...
View Answer

Match the process with the corresponding description.

Figure 14-1 The promoter in the accompanying figure is labeled as ____.

Correct Answer
verified

Explain genomic imprinting and how the phenotype can vary based on paternal or maternal inheritance of a particular allele.

Correct Answer
verified
Concepts to consider: While most genomic...
View Answer

Constitutive genes code for proteins that are needed for survival.

Correct Answer
verified

Figure 14-1 Refer to the accompanying figure. The structure labeled as 7 in the figure of the tryptophan operon is a(n) :

Correct Answer
verified

Exam 14: Gene Regulation

The general transcriptional machinery is composed of the regulatory proteins bound to the promoter of a eukaryotic gene.

Correct AnswerverifiedShow Answer

The organization of the lac operon, from upstream to downstream sequences, is represented by:

Correct AnswerverifiedShow Answer

Bacteria can respond quickly to their surroundings, such as in the presence of an abundant food source. This is because:

Correct AnswerverifiedShow Answer

Long coding RNAs (lnc RNAs) are characterized by:

Correct AnswerverifiedShow Answer

A repressible operon is usually controlled by:

Correct AnswerverifiedShow Answer

Temporal gene regulation refers to which of the following circumstances?

Correct AnswerverifiedShow Answer

Sketch the main elements of an inducible operon, such as the lactose operon, and explain the functions of the operator and promoter regions.

Correct AnswerverifiedConcepts to Consider: An operon is a set...View AnswerShow Answer

Match the type of gene regulation with the process.

Many genes encode proteins that are always needed by a cell, and therefore are always expressed. Such genes are known as:

Correct AnswerverifiedShow Answer

Some eukaryotic DNA sequences act as introns in the cells of some tissues and exons in the cells of other tissues. This is an example of ____, and allows for ____.

Correct AnswerverifiedShow Answer

How does the lactose repressor block transcription of the lactose operon?

Correct AnswerverifiedShow Answer

A TATA box is seen in ____ cells and is the site where ____.

Correct AnswerverifiedShow Answer

Enzymes that alter another protein or enzyme's activity by attaching a phosphate group are called:

Correct AnswerverifiedShow Answer

An activator protein would have which of the following effects on an operon with a positive control mechanism?

Correct AnswerverifiedShow Answer

Some transcription factors, such as leucine zipper proteins, form homodimers or heterodimers. How does this increase the complexity of available strategies of gene regulation?

Correct AnswerverifiedThe example given in the text proposes t...View AnswerShow Answer

Match the process with the corresponding description.

Figure 14-1 The promoter in the accompanying figure is labeled as ____.

Correct AnswerverifiedShow Answer

Explain genomic imprinting and how the phenotype can vary based on paternal or maternal inheritance of a particular allele.

Correct AnswerverifiedConcepts to consider: While most genomic...View AnswerShow Answer

Constitutive genes code for proteins that are needed for survival.

Correct AnswerverifiedShow Answer

Figure 14-1 Refer to the accompanying figure. The structure labeled as 7 in the figure of the tryptophan operon is a(n) :

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Concepts to Consider: An operon is a set...
View Answer

Correct Answer
verified

Some eukaryotic DNA sequences act as introns in the cells of some tissues and exons in the cells of other tissues. This is an example of , and allows for .

Correct Answer
verified

Correct Answer
verified

A TATA box is seen in cells and is the site where .

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The example given in the text proposes t...
View Answer

Correct Answer
verified

Correct Answer
verified
Concepts to consider: While most genomic...
View Answer

Correct Answer
verified

Correct Answer
verified