Question 1

The typical definition of a species is one with distinct characteristics that produce viable offspring when mated with another organism in the same species. Bacterial species cannot be defined as readily, due to the fact that

Accepted Answer

A)   they do not reproduce sexually by way of gametes.
B)   they can receive genetic material from others in their generation, regardless of species.
C)   they have a short generation time and evolve rapidly.
D)   All of the statements are true regarding the indistinct defining of bacterial species.E) A) and D)
F) A) and C)

Question 2

If during the Gram stain procedure, the bacterial cells were viewed immediately after crystal violet was applied, gram-positive cells would be purple but gram-negative cells would be colorless.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following is not a characteristic of bacteria?

Accepted Answer

A)   Its DNA is not encased in a membrane.
B)   It has a cell wall made of peptidoglycans or other distinct chemicals.
C)   It does not have membrane-bound organelles.
D)   Its DNA is wrapped around histones.
E)   All of these are characteristics of bacteria.F) A) and D)
G) A) and E)

Question 4

A 23 year-old female presents at a walk-in clinic with a fever, swollen lymph nodes and yellow spots on the throat. A rapid strep test comes back positive, confirming an infection with Streptococcus pyogenes, which has a thick layer of peptidoglycan in its cell wall. In which of the following taxonomic divisions does S. pyogenes belong?

Accepted Answer

A)   Firmicutes
B)   Gracilicutes
C)   Mendosicutes
D)   TenericutesE) A) and C)
F) A) and B)

Question 5

Which of the following species of bacteria is not closely related to the others?

Accepted Answer

A)   Staphylococcus aureus
B)   Staphylococcus epidermidis
C)   Staphylococcus saprophyticus
D)   Escherichia coli
E)   Staphylococcus capitisF) B) and C)
G) B) and E)

Question 6

The provider educates the patient about his condition, based on information from the laboratory findings and clinical presentation. Later, the RN reinforces the teaching and explains why this infection may be difficult to treat with antibiotics. Which part of the cell envelope restricts the passage of many of drugs into gram-negative bacteria?

Accepted Answer

A)   Peptidoglycan
B)   Cell membrane
C)   Outer membrane layer
D)   LipopolysaccharidesE) A) and D)
F) A) and B)

Question 7

Cells form a ________ arrangement when cells in a chain snap back upon each other forming a row of cells oriented side by side.

Accepted Answer

A)   tetrad
B)   strep
C)   staph
D)   sarcina
E)   palisadeF) B) and E)
G) C) and D)

Question 8

Which statement below supports the argument that gram-negative cells are structurally weaker than gram-positive cells?

Accepted Answer

A)   Gram-negative cells have a thinner layer of peptidoglycan in their cell wall compared to gram-positive cells.
B)   Gram-positive cells contain teichoic acids, whereas gram-negative cells lack teichoic acids in their cell wall.
C)   The envelope of gram-negative cells comprises a hydrophobic outer membrane.
D)   Gram-negative cells contain lipopolysaccharides, the lipid component of which acts as an endotoxin.E) A) and C)
F) C) and D)

Question 9

The site(s)  for most ATP synthesis in bacterial cells is(are)  the ________.

Accepted Answer

A)   ribosomes
B)   mitochondria
C)   cell wall
D)   inclusions
E)   cell membraneF) C) and E)
G) A) and D)

Question 10

Plasmids ________.

Accepted Answer

A)   are found in all bacteria
B)   are essential for growth and metabolism
C)   cannot be passed between organisms
D)   cannot be passed on to progeny
E)   are often the site of pathogenic genesF) A) and B)
G) C) and D)

Question 11

Halobacterium salinarium lives in and requires salt. This is an example of an archaeabacterium described as a(n)  ________.

Accepted Answer

A)   osmophile
B)   halophile
C)   thermophile
D)   psychrophile
E)   methanogenF) A) and C)
G) All of the above

Question 12

Spirochetes have a twisting and flexing locomotion due to appendages called ________.

Accepted Answer

A)   flagella
B)   cilia
C)   fimbriae
D)   periplasmic flagella (axial filaments) 
E)   sex piliF) B) and D)
G) A) and E)

Question 13

The outcome of the Gram stain is based on differences in the cell's ________.

Accepted Answer

A)   ribosomes
B)   inclusions
C)   wall
D)   membrane
E)   flagellaF) A) and B)
G) A) and C)

Question 14

The transfer of genes during bacterial conjugation involves rigid, tubular appendages called ________.

Accepted Answer

A)   flagella
B)   cilia
C)   fimbriae
D)   periplasmic flagella (axial filaments) 
E)   sex piliF) C) and D)
G) B) and D)

Question 15

Which of the following does not pertain to endotoxin?

Accepted Answer

A)   It is a specific cell wall lipid
B)   It can stimulate fever in the human body
C)   It can cause septic shock in the human body
D)   It is involved in typhoid fever and some meningitis cases
E)   It is found in acid-fast bacterial cell wallsF) B) and C)
G) C) and D)

Question 16

The RN provides education for the family about the laboratory findings. Which of the following statements correctly describes the medical importance of a bacterial capsule?

Accepted Answer

A)   A capsule is a slime layer that causes a bacterium to attach to body tissues, making it invasive and difficult to treat.
B)   A capsule allows a bacterium to survive in a dormant state, creating a prolonged course of illness.
C)   A capsule decreases a bacterium's pathogenicity and makes it susceptible to antibiotic treatment.
D)   A capsule can protect a bacterium from the phagocytic activities of white blood cells, enhancing its ability to cause disease.E) C) and D)
F) None of the above

Question 17

Movement of a cell toward a chemical stimulus is termed ________.

Accepted Answer

A)   positive phototaxis
B)   negative phototaxis
C)   positive chemotaxis
D)   negative chemotaxis
E)   a tumbleF) A) and C)
G) B) and D)

Question 18

Each bacterial species represents a distinct organism that can produce viable offspring when mating with other bacteria of its kind.

Accepted Answer

A) True 
 B)False

Question 19

Bacterial cells could have any of the following appendages except ________.

Accepted Answer

A)   flagella
B)   cilia
C)   fimbriae
D)   periplasmic flagella (axial filaments) 
E)   sex piliF) A) and B)
G) B) and E)

Question 20

The chemical components of ribosomes are proteins and ________.

Accepted Answer

A)   mRNA
B)   tRNA
C)   rRNA
D)   All of the choices are correct.
E)   None of the choices is correct.F) B) and D)
G) A) and B)

Exam 3: Bacteria and Archaea

Cells form a ________ arrangement when cells in a chain snap back upon each other forming a row of cells oriented side by side.

Correct Answer
verified

The outcome of the Gram stain is based on differences in the cell's ________.

Correct Answer
verified

The RN provides education for the family about the laboratory findings. Which of the following statements correctly describes the medical importance of a bacterial capsule?

Correct Answer
verified

Which of the following does not pertain to endotoxin?

Correct Answer
verified

Halobacterium salinarium lives in and requires salt. This is an example of an archaeabacterium described as a(n) ________.

Correct Answer
verified

Each bacterial species represents a distinct organism that can produce viable offspring when mating with other bacteria of its kind.

Correct Answer
verified

Movement of a cell toward a chemical stimulus is termed ________.

Correct Answer
verified

Which of the following species of bacteria is not closely related to the others?

Correct Answer
verified

If during the Gram stain procedure, the bacterial cells were viewed immediately after crystal violet was applied, gram-positive cells would be purple but gram-negative cells would be colorless.

Correct Answer
verified

Which statement below supports the argument that gram-negative cells are structurally weaker than gram-positive cells?

Correct Answer
verified

Plasmids ________.

Correct Answer
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Correct Answer
verified

Bacterial cells could have any of the following appendages except ________.

Correct Answer
verified

Correct Answer
verified

Spirochetes have a twisting and flexing locomotion due to appendages called ________.

Correct Answer
verified

The transfer of genes during bacterial conjugation involves rigid, tubular appendages called ________.

Correct Answer
verified

The chemical components of ribosomes are proteins and ________.

Correct Answer
verified

The typical definition of a species is one with distinct characteristics that produce viable offspring when mated with another organism in the same species. Bacterial species cannot be defined as readily, due to the fact that

Correct Answer
verified

Which of the following is not a characteristic of bacteria?

Correct Answer
verified

The site(s) for most ATP synthesis in bacterial cells is(are) the ________.

Correct Answer
verified

Exam 3: Bacteria and Archaea

Cells form a ________ arrangement when cells in a chain snap back upon each other forming a row of cells oriented side by side.

Correct AnswerverifiedShow Answer

The outcome of the Gram stain is based on differences in the cell's ________.

Correct AnswerverifiedShow Answer

The RN provides education for the family about the laboratory findings. Which of the following statements correctly describes the medical importance of a bacterial capsule?

Correct AnswerverifiedShow Answer

Which of the following does not pertain to endotoxin?

Correct AnswerverifiedShow Answer

Halobacterium salinarium lives in and requires salt. This is an example of an archaeabacterium described as a(n) ________.

Correct AnswerverifiedShow Answer

Each bacterial species represents a distinct organism that can produce viable offspring when mating with other bacteria of its kind.

Correct AnswerverifiedShow Answer

Movement of a cell toward a chemical stimulus is termed ________.

Correct AnswerverifiedShow Answer

Which of the following species of bacteria is not closely related to the others?

Correct AnswerverifiedShow Answer

If during the Gram stain procedure, the bacterial cells were viewed immediately after crystal violet was applied, gram-positive cells would be purple but gram-negative cells would be colorless.

Correct AnswerverifiedShow Answer

Which statement below supports the argument that gram-negative cells are structurally weaker than gram-positive cells?

Correct AnswerverifiedShow Answer

Plasmids ________.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Bacterial cells could have any of the following appendages except ________.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Spirochetes have a twisting and flexing locomotion due to appendages called ________.

Correct AnswerverifiedShow Answer

The transfer of genes during bacterial conjugation involves rigid, tubular appendages called ________.

Correct AnswerverifiedShow Answer

The chemical components of ribosomes are proteins and ________.

Correct AnswerverifiedShow Answer

The typical definition of a species is one with distinct characteristics that produce viable offspring when mated with another organism in the same species. Bacterial species cannot be defined as readily, due to the fact that

Correct AnswerverifiedShow Answer

Which of the following is not a characteristic of bacteria?

Correct AnswerverifiedShow Answer

The site(s) for most ATP synthesis in bacterial cells is(are) the ________.

Correct AnswerverifiedShow Answer

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