Question 1

Both crescentin and MreB play a role in formation of the vibrio-shaped bacterium Caulobacter.

Accepted Answer

A) True 
 B)False

Question 2

Compare the process of new peptidoglycan formation in cocci versus rod-shaped cells.

Accepted Answer

In cocci, new cell wall materi

Question 3

Explain how green fluorescent protein (GFP) could be utilized to determine the role of FtsZ in binary fission in Escherichia coli.

Accepted Answer

For visualizing molecular events, report

Question 4

A bacterium that either partially or fully catabolizes an acyl-homoserine lactone will likely disrupt

Accepted Answer

A)  attenuation. 
B)  chemotaxis. 
C)  endospore formation. 
D)  quorum sensing. 
A)  attenuation. 
B)  chemotaxis. 
C)  endospore formation. 
D)  quorum sensing.

Question 5

What are the primary regulator units that control endospore formation?

Accepted Answer

A)  allosteric proteins 
B)  antisense RNAs 
C)  riboswitches 
D)  sigma factors 
A)  allosteric proteins 
B)  antisense RNAs 
C)  riboswitches 
D)  sigma factors

Question 6

Explain the impact spontaneous mutation of the gene minE in an Escherichia coli bacterium would have on future cell divisions.

Accepted Answer

The MinE protein is one of three protein

Question 7

Which of the following proteins is most active in divisome complexes?

Accepted Answer

A)  FtsZ 
B)  crescentin 
C)  MinCD 
D)  MreB 
A)  FtsZ 
B)  crescentin 
C)  MinCD 
D)  MreB

Question 8

The major symptoms of the genetic disorder cystic fibrosis are caused due to biofilm formation by

Accepted Answer

A)  Serratia marcesans. 
B)  Pseudomonas aeruginosa. 
C)  Vibrio cholera. 
D)  Bacillus subtilis. 
A)  Serratia marcesans. 
B)  Pseudomonas aeruginosa. 
C)  Vibrio cholera. 
D)  Bacillus subtilis.

Question 9

Which of the following is NOT a function of DnaA in Caulobacter?

Accepted Answer

A)  initiation of DNA replication 
B)  initiation of swarming 
C)  transcriptional regulation 
D)  All of these answer choices are functions of DnaA. 
A)  initiation of DNA replication 
B)  initiation of swarming 
C)  transcriptional regulation 
D)  All of these answer choices are functions of DnaA.

Question 10

FtsZ is analogous to the protein tubulin in eukaryotic cells.

Accepted Answer

A) True 
 B)False

Question 11

Differential gene expression occurs in each of the following bacterium EXCEPT

Accepted Answer

A)  Bacillus. 
B)  Mycobacterium. 
C)  Anabaena. 
D)  Caulobacter. 
A)  Bacillus. 
B)  Mycobacterium. 
C)  Anabaena. 
D)  Caulobacter.

Question 12

Multiple sigma factors are essential to induce the biosynthesis of endospores, consequently a complex regulatory mechanism such as this has a higher chance of mutation leading to incorrect functioning compared to a simple repression mechanism.

Accepted Answer

A) True 
 B)False

Question 13

Explain how FtsZ-type proteins being found in mitochondria and chloroplasts strengthens or weakens the endosymbiosis theory.

Accepted Answer

The protein FtsZ, encoded by the gene ft

Question 14

Persistence is a heritable trait.

Accepted Answer

A) True 
 B)False

Question 15

Bacteria from the genus Caulobacter are used to model cellular differentiation in eukaryotes. The abundance of CtrA, DnaA, and GcrA separately control activity of other genes necessary for differentiation in Caulobacter. Thus, these three proteins can be classified as

Accepted Answer

A)  activating sensors. 
B)  heterologous regulators. 
C)  differentiating regulons. 
D)  transcriptional regulators. 
A)  activating sensors. 
B)  heterologous regulators. 
C)  differentiating regulons. 
D)  transcriptional regulators.

Question 16

During elongation of a cell during binary fission, small gaps caused by transglycosylases are formed before cell membrane precursors can be inserted.

Accepted Answer

A) True 
 B)False

Question 17

There are four basic stages to biofilm formation. Which of the following is the correct order of these stages?

Accepted Answer

A)  attachment, colonization, development, dispersal 
B)  colonization, attachment, development, dispersal 
C)  development, colonization, attachment, dispersal 
D)  attachment, development, colonization, dispersal 
A)  attachment, colonization, development, dispersal 
B)  colonization, attachment, development, dispersal 
C)  development, colonization, attachment, dispersal 
D)  attachment, development, colonization, dispersal

Question 18

A researcher unexpectedly identified mutant bacteria deficient in the FtsZ protein. Their growth appeared filamentous, and displayed incomplete cell division. Explain the role of the FtsZ protein and how a deficiency would account for this altered growth.

Accepted Answer

FtsZ is an essential cell division prote

Question 19

The spherical shape of Staphylococcus aureus is a result of MreB function.

Accepted Answer

A) True 
 B)False

Question 20

In the Caulobacter life cycle, the role of swarmer cells is strictly for reproduction.

Accepted Answer

A) True 
 B)False

Exam 7: Molecular Biology of Microbial Growth

Both crescentin and MreB play a role in formation of the vibrio-shaped bacterium Caulobacter.

Compare the process of new peptidoglycan formation in cocci versus rod-shaped cells.

Explain how green fluorescent protein (GFP) could be utilized to determine the role of FtsZ in binary fission in Escherichia coli.

A bacterium that either partially or fully catabolizes an acyl-homoserine lactone will likely disrupt

What are the primary regulator units that control endospore formation?

Explain the impact spontaneous mutation of the gene minE in an Escherichia coli bacterium would have on future cell divisions.

Which of the following proteins is most active in divisome complexes?

The major symptoms of the genetic disorder cystic fibrosis are caused due to biofilm formation by

Which of the following is NOT a function of DnaA in Caulobacter?

FtsZ is analogous to the protein tubulin in eukaryotic cells.

Differential gene expression occurs in each of the following bacterium EXCEPT

Multiple sigma factors are essential to induce the biosynthesis of endospores, consequently a complex regulatory mechanism such as this has a higher chance of mutation leading to incorrect functioning compared to a simple repression mechanism.

Explain how FtsZ-type proteins being found in mitochondria and chloroplasts strengthens or weakens the endosymbiosis theory.

Persistence is a heritable trait.

Bacteria from the genus Caulobacter are used to model cellular differentiation in eukaryotes. The abundance of CtrA, DnaA, and GcrA separately control activity of other genes necessary for differentiation in Caulobacter. Thus, these three proteins can be classified as

During elongation of a cell during binary fission, small gaps caused by transglycosylases are formed before cell membrane precursors can be inserted.

There are four basic stages to biofilm formation. Which of the following is the correct order of these stages?

A researcher unexpectedly identified mutant bacteria deficient in the FtsZ protein. Their growth appeared filamentous, and displayed incomplete cell division. Explain the role of the FtsZ protein and how a deficiency would account for this altered growth.

The spherical shape of Staphylococcus aureus is a result of MreB function.

In the Caulobacter life cycle, the role of swarmer cells is strictly for reproduction.

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Taking the Measure of Microbial Systems

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