Quiz 4

Question 1

Fungi __________.

have cell walls of peptidoglycan
secrete extracellular enzymes to breakdown nutrients
are procaryotic
are photosynthetic

Answer 1

secrete extracellular enzymes to breakdown nutrients

Question 2

Fungi that can grow in a yeast or a mold form depending on the conditions are termed __________.
Fungi that can grow in a yeast or a mold form depending on the conditions are termed __________.
dimorphic
amphimorphic
pleomorphic
morphic

Answer 2

dimorphic

Question 3

Which of the following is not an example of a biofilm?
Which of the following is not an example of a biofilm?
A single bacterial cell growing on an agar surface.
Dental plaque.
Toilet bowl scum.
Organisms that colonize indwelling medical devices.

Answer 3

A single bacterial cell growing on an agar surface.

Question 4

\_\_\_\_\_\_\_\_ exhibit yeast-like growth at human body temperatures and mold-like growth at room temperature
Water molds
Dimorphic fungi
Slime molds
Club fungi

Answer 4

Dimorphic fungi

Question 5

ALL fungal infections can broadly be termed
ALL fungal infections can broadly be termed
systemic.
superficial.
benign.
mycoses.

Answer 5

mycoses.

Question 6

Bacteria will become part of a biofilm because __________.
It allows all compounds in the environment to diffuse to the organism’s location much faster.
It allows them to live separated from other bacteria.
It allows them to be phagocytosed easier.
It allows them to remain in a favorable niche.

Answer 6

It allows them to remain in a favorable niche.

Question 7

The cells within a biofilm can undergo intra-species signaling; however, inter-species signaling does not occur.
The cells within a biofilm can undergo intra-species signaling; however, inter-species signaling does not occur.
True
False

Answer 7

F

Question 8

The fruiting body of a mushroom is called
The fruiting body of a mushroom is called
Plasmodiocarps
Ascocarps
Sorocarps
Basidiocarps

Answer 8

Basidiocarps

Question 9

A bacterium that either partially or fully catabolizes an acyl-homoserine lactone will likely disrupt
A bacterium that either partially or fully catabolizes an acyl-homoserine lactone will likely disrupt
attenuation.
endospore formation.
chemotaxis.
quorum sensing.

Answer 9

quorum sensing
Quorum sensing is a system of stimuli and response correlated to population density. Quorum sensing (QS) allows bacteria to restrict the expression of specific genes to the high cell densities at which the resulting phenotypes will be most beneficial.

Question 10

Amphotericin B is an antifungal medication. What might its mechanism of action be?
Amphotericin B is an antifungal medication. What might its mechanism of action be?
It binds to phospholipids in fungal membranes.
It prevents synthesis of peptidoglycan cell walls
It binds to ribosomes.
It binds to ergosterol.

Answer 10

It binds to ergosterol- a sterol found in cell membranes of fungi and protozoa, serving many of the same functions that cholesterol serves in animal cells.

Question 11

Which fungal genus is correctly matched to the class of disease it causes?
Which fungal genus is correctly matched to the class of disease it causes?
systemic mycosis: Sporothrix
superficial mycosis: Aspergillus
subcutaneous mycosis: Microsporum
systemic mycosis: Candida

Answer 11

systemic mycosis: Candida

Question 12

Bacterial biofilms are important medically because:
Bacterial biofilms are important medically because:
They are resistant to antibiotics.
They may form on catheters
They can form dental plaque.
All are correct.

Answer 12

all correct

Question 13

Which of the following is considered an opportunistic pathogen?
Which of the following is considered an opportunistic pathogen?
Candida albicans
Toxoplasma gondii
Trichomoniasis vaginalis
Plasmodium vivax

Answer 13

Candida albicans

Question 14

Characteristics of biofilms include __________.
Characteristics of biofilms include __________.
the presence of a cellulose matrix to hold the organisms together
They are a single layer of cells.
They do not have to be attached to a surface.
the presence of one or more species of bacteria

Answer 14

the presence of one or more species of bacteria

Question 15

Superficial mycoses are caused by a group of fungal pathogens called __________.
Superficial mycoses are caused by a group of fungal pathogens called __________.
dermatologic
dematiaceous
dimorphic
dermatophytes

Answer 15

dermatophytes

Question 16

Athlete's foot is an example of a
Athlete's foot is an example of a
superficial parasitic infection.
superficial fungal infection.
hypersensitivity reaction.
protozoal infection.

Answer 16

superficial fungal infection.

Question 17

Select the corrent order in which biofilms form:
Select the corrent order in which biofilms form:
Active dispersal, Development, Colonisation, Reversable adhesion, Irreversible adhesion.
Reversible adhesion, Irreversible adhesion, Colonisation, Development, Active dispersal
Reversible adhesion, Irreversible adhesion, Development, Colonisation, Active dispersal.
Development, Active dispersal, Colonisation, Reversable adhesion, Irreversible adhesion

Question 18

Which of the following is an example of a biofilm?
Which of the following is an example of a biofilm?
marine diatom
soap scum
dental plaque
planktonic microcolony

Answer 18

dental plaque

Question 19

The bread mold Rhizopus stolonifer belongs to which of the following fungal divisions?
The bread mold Rhizopus stolonifer belongs to which of the following fungal divisions?
Zygomycota
Ascomycota
Chytridiomycota
Microsporidia

Answer 19

Zygomycota

Question 20

Fungi
are major causes of plant diseases.
are pest organisms that have no commercial value
Fungi
are major causes of plant diseases.
are pest organisms that have no commercial value
Only (i.) is true.
Both (i.) and (ii.) are true
Neither (i.) or (ii.) are true
Only (ii.) is true

Answer 20

i