Question 1

What protein has been shown to play an important role in cell division through the formation of the Z-ring?

Accepted Answer

A)  FtsZ 
B)  MreB 
C)  ParM 
D)  FlaA 
E)  PepZ 
A)  FtsZ 
B)  MreB 
C)  ParM 
D)  FlaA 
E)  PepZ A

Question 2

The proton motive force (PMF)across a cell membrane can be used for which of these processes?

Accepted Answer

A)  Generate ATP. 
B)  Propel the flagella. 
C)  Transport nutrients into the cell. 
D)  Transport molecules out of the cell. 
E)  All of these choices. 
A)  Generate ATP. 
B)  Propel the flagella. 
C)  Transport nutrients into the cell. 
D)  Transport molecules out of the cell. 
E)  All of these choices. E

Question 3

The glycan portion of peptidoglycan is composed of alternating units of which two compounds?

Accepted Answer

A)  glucose and fructose 
B)  N-acetylmuramic acid and N-acetylglucosamine 
C)  N-acetylmannose and N-acetylglucose 
D)  N-acetylfructose and N-acetylglucose 
E)  N-acetylmannitol and N-acetylsorbitol 
A)  glucose and fructose 
B)  N-acetylmuramic acid and N-acetylglucosamine 
C)  N-acetylmannose and N-acetylglucose 
D)  N-acetylfructose and N-acetylglucose 
E)  N-acetylmannitol and N-acetylsorbitol B

Question 4

Some bacteria produce sterol-like molecules called ___ that help to stabilize the plasma membrane.

Accepted Answer

A)  ergosterol 
B)  progesterone 
C)  hopanoids 
D)  phycols 
E)  stigmasterols 
A)  ergosterol 
B)  progesterone 
C)  hopanoids 
D)  phycols 
E)  stigmasterols

Question 5

The ABC transporter system uses phosphoenolpyruvate as the energy source to drive transport.

Accepted Answer

A) True 
 B)False

Question 6

The bacterial chromosome is a highly condensed structure that is tightly wound up around itself to fit into the bacterial cell.What is the main enzyme responsible for condensing the DNA?

Accepted Answer

A)  DNA polymerase 
B)  DNA ligase 
C)  DNA topoisomerase 
D)  DNA endonuclease 
E)  DNA synthetase 
A)  DNA polymerase 
B)  DNA ligase 
C)  DNA topoisomerase 
D)  DNA endonuclease 
E)  DNA synthetase

Question 7

What is a signal peptide?

Accepted Answer

A)  The amino acid sequence of a protein that detects changes in the external environment and signals this change to components in the cell. 
B)  A regulatory protein that turns on/off the expression of certain genes. 
C)  A protein used to signal cell division. 
D)  A short amino acid sequence on the end of a protein that is used for transport of the protein out of the cell. 
E)  A protein in the cytoplasmic membrane that is used to communicate with other closely related cells. 
A)  The amino acid sequence of a protein that detects changes in the external environment and signals this change to components in the cell. 
B)  A regulatory protein that turns on/off the expression of certain genes. 
C)  A protein used to signal cell division. 
D)  A short amino acid sequence on the end of a protein that is used for transport of the protein out of the cell. 
E)  A protein in the cytoplasmic membrane that is used to communicate with other closely related cells.

Question 8

What advantage against antibacterials does the outer membrane of Gram-negative bacteria offer when compared to Gram-positive bacteria?

Accepted Answer

The outer membrane of Gram-negative bact

Question 9

Magnetosomes are an example of membrane enclosed organelles found in some bacteria.

Accepted Answer

A) True 
 B)False

Question 10

What is the main function of peptidoglycan?

Accepted Answer

A)  Controlling movement of nutrients into and outof the cell. 
B)  Protecting the cell from harmful chemicals. 
C)  Regulating the transport of water into the cell. 
D)  Protecting against osmotic stress. 
E)  Generating energy through electron transport phosphorylation. 
A)  Controlling movement of nutrients into and outof the cell. 
B)  Protecting the cell from harmful chemicals. 
C)  Regulating the transport of water into the cell. 
D)  Protecting against osmotic stress. 
E)  Generating energy through electron transport phosphorylation.

Question 11

Short hair-like protrusions on the surface of some bacterial cells,used primarily for attachment but some are used for motility,and called ___ .

Accepted Answer

The answer of Short hair-like protrusions on the surface of...

Question 12

A mutant strain of E.coli has been isolated that has a mutation in the mreB gene.Describe the phenotypic appearance of the mutant strain.Why does it have this appearance?

Accepted Answer

The mutant strain of E. coli with a muta

Question 13

The bacterial ___ functions in protection from desiccation,and phagocytosis,and in attachment.

Accepted Answer

The answer of The bacterial ___ functions in protection from...

Question 14

What is the typical length of a bacterium?

Accepted Answer

A)  5 - 10 nm 
B)  0.5 - 5 µm 
C)  20 - 40 µm 
D)  5 - 10 mm 
E)  20 - 40 mm 
A)  5 - 10 nm 
B)  0.5 - 5 µm 
C)  20 - 40 µm 
D)  5 - 10 mm 
E)  20 - 40 mm

Question 15

What does the ABC transporter system use as the source of energy for transport?

Accepted Answer

A)  pyruvate 
B)  glucose 
C)  ATP 
D)  NADH 
E)  diffusion 
A)  pyruvate 
B)  glucose 
C)  ATP 
D)  NADH 
E)  diffusion

Question 16

The lipopolysaccharides (LPS)of most Gram-negative bacteria is able to trigger a very strong inflammatory response in humans.

Accepted Answer

A) True 
 B)False

Question 17

Which of these describes the peritrichous arrangement of flagella?

Accepted Answer

A)  Flagella all around the cell. 
B)  Flagella at both polar ends of the cell. 
C)  Flagella in a tuft at one end of the cell. 
D)  Flagella inside the periplasm wrapping around the cell. 
E)  Flagella on a single side of the cell. 
A)  Flagella all around the cell. 
B)  Flagella at both polar ends of the cell. 
C)  Flagella in a tuft at one end of the cell. 
D)  Flagella inside the periplasm wrapping around the cell. 
E)  Flagella on a single side of the cell.

Question 18

What is the function of the bacterial capsule?

Accepted Answer

A)  Attachment. 
B)  Preventing phagocytosis by phagocytic cells. 
C)  Resisting desiccation. 
D)  All of these choices. 
E)  None of these choices. 
A)  Attachment. 
B)  Preventing phagocytosis by phagocytic cells. 
C)  Resisting desiccation. 
D)  All of these choices. 
E)  None of these choices.

Question 19

Which of these is included in the the Gram-positive cell envelope?

Accepted Answer

A)  peptidoglycan, LPS, and lipoteichoic acids. 
B)  peptidoglycan, teichoic acids, and lipoteichoic acids. 
C)  peptidoglycan, LPS, and teichoic acids. 
D)  peptidoglycan, LPS, and a periplasmic space. 
E)  teichoic acids, lipoteichoic acids, and a large periplasmic space. 
A)  peptidoglycan, LPS, and lipoteichoic acids. 
B)  peptidoglycan, teichoic acids, and lipoteichoic acids. 
C)  peptidoglycan, LPS, and teichoic acids. 
D)  peptidoglycan, LPS, and a periplasmic space. 
E)  teichoic acids, lipoteichoic acids, and a large periplasmic space.

Question 20

All of the following are taxonomic groups used to classify bacteria EXCEPT:

Accepted Answer

A)  Kingdom. 
B)  Phylum. 
C)  Class. 
D)  Family. 
E)  Genus. 
A)  Kingdom. 
B)  Phylum. 
C)  Class. 
D)  Family. 
E)  Genus.

Exam 2: Bacteria

What protein has been shown to play an important role in cell division through the formation of the Z-ring?

The proton motive force (PMF)across a cell membrane can be used for which of these processes?

The glycan portion of peptidoglycan is composed of alternating units of which two compounds?

Some bacteria produce sterol-like molecules called ___ that help to stabilize the plasma membrane.

The ABC transporter system uses phosphoenolpyruvate as the energy source to drive transport.

The bacterial chromosome is a highly condensed structure that is tightly wound up around itself to fit into the bacterial cell.What is the main enzyme responsible for condensing the DNA?

What is a signal peptide?

What advantage against antibacterials does the outer membrane of Gram-negative bacteria offer when compared to Gram-positive bacteria?

Magnetosomes are an example of membrane enclosed organelles found in some bacteria.

What is the main function of peptidoglycan?

Short hair-like protrusions on the surface of some bacterial cells,used primarily for attachment but some are used for motility,and called ___ .

A mutant strain of E.coli has been isolated that has a mutation in the mreB gene.Describe the phenotypic appearance of the mutant strain.Why does it have this appearance?

The bacterial ___ functions in protection from desiccation,and phagocytosis,and in attachment.

What is the typical length of a bacterium?

What does the ABC transporter system use as the source of energy for transport?

The lipopolysaccharides (LPS)of most Gram-negative bacteria is able to trigger a very strong inflammatory response in humans.

Which of these describes the peritrichous arrangement of flagella?

What is the function of the bacterial capsule?

Which of these is included in the the Gram-positive cell envelope?

All of the following are taxonomic groups used to classify bacteria EXCEPT:

The Microbial World

Eukaryal Microbes

Archaea

Viruses

Cultivating Microorganisms

DNA Replication and Gene Expression

Viral Replication Strategies

Bacterial Genetic Analysis

Microbial Genomics

Regulation of Gene Expression

Microbial Biotechnology

Metabolism

Biogeochemical Cycles

Microbial Ecosystems

The Microbiology of Food and Water

Microbial Symbionts

Introduction to Infectious Diseases

Innate Host Defenses Against Microbial Invasion

Adaptive Immunity

Survival in the Host

Viral Pathogenesis

Eukaryal Microbe Pathogenesis

Control of Infectious Diseases

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