Question 1

Gene regulation during sporulation in Bacillus subtilis involves BOTH temporal and spatial control.

Accepted Answer

A) True 
 B)False

Question 2

When bound to the DNA,the repressor protein usually prevents attachment of the RNA polymerase to the __________.

Accepted Answer

A)  operon
B)  operator
C)  promoter
D)  regulatorE) All of the above
F) A) and D)

Question 3

The standard or housekeeping sigma factor used most often by

Accepted Answer

A)  70
B)  32
C)  S
D)  E
E)  coli RNA polymerase under normal growth conditions is called sigma ___.F) A) and D)
G) A) and B)

Question 4

The binding of arabinose to the AraC protein allows it to form a loop in the DNA upstream of the ara operon promoter.

Accepted Answer

A) True 
 B)False

Question 5

When there is no arabinose available in the environment,the AraC protein acts as a(n)______________ for the
E.coli ara operon.

Accepted Answer

The answer of When there is no arabinose available in...

Question 6

The sensor kinase for the OmpF: OmpC two-component regulatory system is

Accepted Answer

A)  the OmpK protein.
B)  the EnvZ protein.
C)  the MicF RNA.
D)  None of the choices are correct.E) All of the above
F) B) and D)

Question 7

A collection of genes or operons controlled by a common regulatory protein is called a(n)___________ .

Accepted Answer

The answer of A collection of genes or operons controlled...

Question 8

When does a cell regulate gene expression?

Accepted Answer

A)  Pretranscription through postranslation
B)  Posttranscription through postranslation
C)  Pretranscription through pretranslation
D)  Posttranscription through pretranslationE) All of the above
F) B) and C)

Question 9

While standard two-component regulatory systems typically act to control gene transcription,phosphorelay systems can act either to control gene transcription or to control .

Accepted Answer

A)  translation
B)  protein activity
C)  DNA replication
D)  All of the choices are correct.E) None of the above
F) A) and B)

Question 10

How do translational riboswitches and transcriptional riboswitches differ?

Accepted Answer

A)  Translational riboswitches are mainly observed in Gram-negative bacteria while transcriptional riboswitches are associated with Gram-positive bacteria.
B)  Translational riboswitches are located in the mRNA trailer while transcriptional riboswitches are in mRNA leader sequence.
C)  Translational riboswitch effectors bind to ribosomes while transcriptional riboswitch effectors bind to mRNA.
D)  All of these are differences between translational and transcriptional riboswitches.E) C) and D)
F) A) and C)

Question 11

Bioluminescence in Vibrio harveyi is due to an alternate sigma factor that prevents from binding to Lux mRNA,thus allowing translation of bioluminescent genes.

Accepted Answer

A)  antisense
B)  phosphate
C)  ribosomes
D)  autoinducing proteinsE) B) and C)
F) A) and D)

Question 12

Most

Accepted Answer

A)  CAP
B)  MicF
C)  Hfq
D)  None of the choices are correct.
E)  coli antisense RNAs work with a protein called ______ to regulate their target mRNAs.F) A) and D)
G) B) and C)

Question 13

During the stringent response,ppGpp-regulated genes for amino acid biosynthesis have a(n)  -rich promoter,thus forming a open initiation complex.

Accepted Answer

A)  GC-rich; more stable
B)  GC-rich; less stable
C)  AT-rich; more stable
D)  AT-rich; less stableE) C) and D)
F) B) and C)

Question 14

In attenuation regulation of the trp operon,which stem loop forms when tryptophan is readily available to the cell?

Accepted Answer

A)  3:4
B)  1:3
C)  2:3
D)  2:4E) None of the above
F) A) and D)

Question 15

Which of the following is not a regulatory mechanism used to control the tryptophan operon in Escherichia coli?

Accepted Answer

A)  Repression
B)  Catabolite repression
C)  Attenuation
D)  All of the choices are correct.E) A) and B)
F) B) and C)

Question 16

In two component regulatory systems,the response regulator typically receives a ____________ from the sensor kinase when it has been activated.

Accepted Answer

A)  pyruvate group
B)  phosphoryl group
C)  acetyl group
D)  methyl groupE) A) and C)
F) All of the above

Question 17

If a set of genes is induced in the presence of the controlling substance,it is referred to as __________ control.

Accepted Answer

The answer of If a set of genes is induced...

Question 18

One way to regulate gene expression is through the production of different sigma factors.These cause RNA polymerase to bind to different sets of promoters,thereby altering the pattern of gene expression.

Accepted Answer

A) True 
 B)False

Question 19

During regulation of biofilm formation in Pseudomonas,cells leave the biofilm when levels of cyclic dimeric GMP are high.

Accepted Answer

A) True 
 B)False

Question 20

__________ activate repressor proteins,thereby decreasing the synthesis of certain enzymes.

Accepted Answer

A)  Inducers
B)  Corepressors
C)  Effectors
D)  ModulatorsE) A) and B)
F) A) and C)

Exam 14: Regulation of Bacterial Cellular Processes

During the stringent response,ppGpp-regulated genes for amino acid biosynthesis have a(n) -rich promoter,thus forming a open initiation complex.

Correct AnswerverifiedShow Answer

How do translational riboswitches and transcriptional riboswitches differ?

Correct AnswerverifiedShow Answer

One way to regulate gene expression is through the production of different sigma factors.These cause RNA polymerase to bind to different sets of promoters,thereby altering the pattern of gene expression.

Correct AnswerverifiedShow Answer

Gene regulation during sporulation in Bacillus subtilis involves BOTH temporal and spatial control.

Correct AnswerverifiedShow Answer

When bound to the DNA,the repressor protein usually prevents attachment of the RNA polymerase to the __________.

Correct AnswerverifiedShow Answer

While standard two-component regulatory systems typically act to control gene transcription,phosphorelay systems can act either to control gene transcription or to control .

Correct AnswerverifiedShow Answer

Which of the following is not a regulatory mechanism used to control the tryptophan operon in Escherichia coli?

Correct AnswerverifiedShow Answer

In two component regulatory systems,the response regulator typically receives a ____________ from the sensor kinase when it has been activated.

Correct AnswerverifiedShow Answer

If a set of genes is induced in the presence of the controlling substance,it is referred to as __________ control.

Correct AnswerverifiedShow Answer

A collection of genes or operons controlled by a common regulatory protein is called a(n)___________ .

Correct AnswerverifiedShow Answer

In attenuation regulation of the trp operon,which stem loop forms when tryptophan is readily available to the cell?

Correct AnswerverifiedShow Answer

Bioluminescence in Vibrio harveyi is due to an alternate sigma factor that prevents from binding to Lux mRNA,thus allowing translation of bioluminescent genes.

Correct AnswerverifiedShow Answer

When does a cell regulate gene expression?

Correct AnswerverifiedShow Answer

__________ activate repressor proteins,thereby decreasing the synthesis of certain enzymes.

Correct AnswerverifiedShow Answer

When there is no arabinose available in the environment,the AraC protein acts as a(n)______________ for the E.coli ara operon.

Correct AnswerverifiedShow Answer

The standard or housekeeping sigma factor used most often by

Correct AnswerverifiedShow Answer

During regulation of biofilm formation in Pseudomonas,cells leave the biofilm when levels of cyclic dimeric GMP are high.

Correct AnswerverifiedShow Answer

The sensor kinase for the OmpF: OmpC two-component regulatory system is

Correct AnswerverifiedShow Answer

The binding of arabinose to the AraC protein allows it to form a loop in the DNA upstream of the ara operon promoter.

Correct AnswerverifiedShow Answer

Most

Correct AnswerverifiedShow Answer

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