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Flashcards in Quiz 4 Deck (20)
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1
Q

Fungi __________.

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

A

secrete extracellular enzymes to breakdown nutrients

2
Q

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

A

dimorphic

3
Q

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.

A

A single bacterial cell growing on an agar surface.

4
Q
\_\_\_\_\_\_\_\_ exhibit yeast-like growth at human body temperatures and mold-like growth at room temperature
Water molds
Dimorphic fungi
Slime molds
Club fungi
A

Dimorphic fungi

5
Q

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

A

mycoses.

6
Q

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.

A

It allows them to remain in a favorable niche.

7
Q

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

A

F

8
Q

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

A

Basidiocarps

9
Q

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.

A

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.

10
Q

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.

A

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.

11
Q

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

A

systemic mycosis: Candida

12
Q

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.

A

all correct

13
Q

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

A

Candida albicans

14
Q

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

A

the presence of one or more species of bacteria

15
Q

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

A

dermatophytes

16
Q
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.
A

superficial fungal infection.

17
Q

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

A
18
Q

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

A

dental plaque

19
Q

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

A

Zygomycota

20
Q
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
A

i