Microbiology 020 - General Microbiology » Winter 2022 » Lecture Exam 1 _Ch 1, 2, 3, 4
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Question #1
The Dutch merchant who made and used quality magnifying lenses to see and record microorganisms was _____.
A.
Francesco Redi
B.
Louis Pasteur
C.
Joseph Lister
D.
Antonie van Leeuwenhoek
E.
Robert Koch
Question #2
All of the following are lipids except _____.
A.
phospholipid
B.
triglyceride
C.
starch
D.
cholesterol
E.
wax
Question #3
All microorganisms are best defined as organisms that ______.
A.
cause human disease
B.
are too small to be seen with the unaided eye
C.
are infectious particles
D.
can only be found growing in laboratories
E.
lack a cell nucleus
Question #4
Koch's postulates are criteria used to establish that ______.
A.
microbes can be used to clean up toxic spills
B.
life forms can only arise from preexisting life forms
C.
a specific microbe should be classified in a specific kingdom
D.
a specific microbe is the cause of a specific disease
E.
microbes are found on dust particles
Question #5
Cells, like bacteria and archaea, that do not have a nucleus in their cells have traditionally been called _____.
A.
fermenters
B.
pathogens
C.
eukaryotes
D.
decomposers
E.
prokaryotes
Question #6
When humans manipulate the genes of microorganisms, the process is called _____.
A.
taxonomy
B.
genetic engineering
C.
bioremediation
D.
epidemiology
E.
immunology
Question #7
Disease-causing microorganisms are called _____.
A.
decomposers
B.
eukaryotes
C.
fermenters
D.
prokaryotes
E.
pathogens
Question #8
Despite the lack of a membrane-bound nucleus, bacteria and archaea are cells with a complex organizational structure.
A.
TRUE
B.
FALSE
Question #9
Which group of microorganisms is composed only of hereditary material wrapped in a protein covering?
A.
Parasites
B.
Helminths
C.
Bacteria
D.
Fungi
E.
Viruses
Question #10
Select the correct descending taxonomic hierarchy:
A.
kingdom, domain,phylum
B.
family, order,class
C.
genus, species,family
D.
class, phylum,order
E.
family, genus,species
Question #11
The most prevalent worldwide infectious diseases are _____.
A.
diarrheal diseases
B.
malaria diseases
C.
AIDS-related diseases
D.
respiratory diseases
E.
measles
Question #12
Taxonomy does not involve _____.
A.
classification
B.
common name
C.
identification
D.
taxa
E.
nomenclature
Question #13
Which statement correctly compares the sizes of different microorganisms?
A.
Eukaryotic microorganisms are smaller than viruses
B.
Archaea are larger than eukaryotic microorganisms but smaller than bacteria
C.
Bacteria are larger than viruses
D.
Bacteria are larger than eukaryotic microorganisms
Question #14
All proteins are enzymes.
A.
FALSE
B.
TRUE
Question #15
A.
FALSE
B.
TRUE
Question #16
Organic chemicals always have a basic framework of the element _____ bonded to other atoms.
A.
carbon
B.
phosphorous
C.
nitrogen
D.
oxygen
E.
hydrogen
Question #17
Helminths are _____.
A.
parasitic worms
B.
protozoa
C.
infectious particles
D.
molds
E.
bacteria
Question #18
A.
bioremediation
B.
nomenclature
C.
determining evolutionary relatedness
D.
recombinant DNA
E.
determining if that species is the cause of a new disease
Question #19
Nucleic acids have primary, secondary, tertiary, and quaternary levels of organization.
A.
FALSE
B.
TRUE
Question #20
Select the elements necessary for good microscopy.
A.
Ability to observe cells in the living state, Use of wavelengths other than the visible spectrum, Specimen holder
B.
Adequate magnification, Contrast, Resolution
C.
Ability to observe cells in the living state, Contrast, Specimen holder
D.
Ability to observe cells in the living state, Adequate magnification, Specimen holder
Question #21
The type of microscope in which you would see brightly illuminated specimens against a black background is _____.
A.
phase contrast
B.
dark field
C.
electron
D.
fluorescence
E.
bright field
Question #22
Agar is a complex polysaccharide that comes from a(n) _____.
A.
algae
B.
euglena
C.
mold
D.
fungus
E.
green plant
Question #23
Which type of media would be the best choice when shipping a sample of bacteria to a laboratory to be tested from a satellite office site?
A.
Transport
B.
Blood
C.
General purpose
D.
Thioglycollate
E.
EMB
Question #24
Which type of microscope does not use light in forming the specimen image?
A.
Fluorescence
B.
Dark field
C.
Electron
D.
Bright field
E.
Phase contrast
Question #25
A nutrient medium that contains at least one ingredient that is NOT chemically definable would be termed _____.
A.
reducing
B.
minimal
C.
enriched
D.
complex
E.
synthetic
Question #26
Which of the following is not a benefit of agar as a solid medium?
A.
Has flexibility
B.
Can be inoculated and poured at a temperature that is not harmful
C.
Holds moisture
D.
Is digested by most microbes
E.
Is solid at room temperature
Question #27
A microbiologist inoculates Staphylococcus epidermidis and Escherichia coli into a culture medium. Following incubation, only the E. coli grows in the culture. What is the most likely explanation?
A.
The culturemedium must be selective.
B.
Themicrobiologist used too much inoculum.
C.
The culture iscontaminated.
D.
The culturemedium must be differential.
E.
The incubationtemperature was incorrect.
Question #28
The specimen preparation that is best for viewing cell motility is ______.
A.
negative stain
B.
fixed stained smear
C.
Gram stain
D.
hanging drop
E.
flagellar stain
Question #29
Which type of microscope bombards a whole, metal-coated specimen with electrons moving back and forth over it?
A.
Transmission electron
B.
Scanning electron
C.
Differential interference contrast
D.
Fluorescence
E.
Phase contrast
Question #30
A microbiologist makes a fixed smear of bacterial cells and stains them with Loeffler's methylene blue. All the cells appear blue under the oil lens. This is an example of ______.
A.
using an acidic dye
B.
simple staining
C.
using the acid-fast stain
D.
capsule staining
E.
negative staining
Question #31
Select the methods below that enable the isolation of bacteria.
A.
Loop dilution, Spread plate, Use of selective media, Quadrant streak plate
B.
Gram stain, Loop dilution, Spread plate, Use of selective media,
C.
Gram stain, Loop dilution, Bright-field microscopy, Use of selective media,
D.
Gram stain, Bright-field microscopy, Spread plate, Use of selective media,
Question #32
Which of the following characteristics refers to the microscope's ability to show two separate entities as separate and distinct?
A.
None of the choices are correct.
B.
Refraction
C.
All of thechoices are correct.
D.
Resolving power
E.
Magnification
Question #33
Which type of medium is able to distinguish different species or types of microorganisms based on an observable change in the colonies or in the medium?
A.
Reducing
B.
Selective
C.
Enumeration
D.
Enriched
E.
Differential
Question #34
A common medium used for growing fastidious bacteria is ______.
A.
a reducing medium
B.
MacConkey medium
C.
blood agar
D.
trypticase soy agar
E.
mannitol salt agar
Question #35
All of the following pertain to the fluorescence microscope except ______.
A.
it uses electrons to produce a specimen image
B.
it requires the use of dyes like acridine and fluorescein
C.
it requires an ultraviolet radiation source
D.
it is a type of compound microscope
E.
it is commonly used to diagnose certain infections
Question #36
Which of the following is not an inoculating tool?
A.
Swab
B.
Loop
C.
Needle
D.
Petri dish
E.
Pipette
Question #37
Which of the following magnifies the specimen to produce its real image?
A.
Condenser
B.
Body
C.
Objective lens
D.
Nosepiece
E.
Ocular lens
Question #38
Bacteria that require special growth factors and complex nutrients are termed _____.
A.
anaerobic
B.
microaerophilic
C.
aerobic
D.
fastidious
E.
autotrophic
Question #39
A flagellum is anchored into the bacterial cell envelope by its _______.
A.
hook
B.
filament
C.
basal body
D.
outer membrane
E.
sheath
Question #40
Which of the following is not true of the outer membrane?
A.
The porinproteins create channels through the outer membrane.
B.
The lipid portionof the lipopolysaccharide layer is an endotoxin.
C.
Gram-positivebacteria have an outer membrane.
D.
The innermost layer is a phospholipid bilayer.
E.
The uppermost layer is made of lipopolysaccharides.
Question #41
Peptidoglycan is a unique macromolecule found in bacterial _______.
A.
capsules
B.
inclusions
C.
cell membranes
D.
slime layers
E.
cell walls
Question #42
Endospores are ________.
A.
living structures
B.
resistant to destruction by radiation
C.
resistant to heat and chemical destruction
D.
All of the choices are correct.
E.
metabolically inactive
Question #43
Each bacterial species represents a distinct organism that can produce viable offspring when mating with other bacteria of its kind.
A.
TRUE
B.
FALSE
Question #44
Lysozyme is most effective against _______.
A.
mycoplasmas
B.
cyanobacteria
C.
gram-negative organisms
D.
gram-positive organisms
E.
archaea
Question #45
During the Gram stain, ______ cells decolorize when the alcohol is applied.
A.
gram-negative
B.
gram-positive
C.
both gram-positive and -negative
D.
Question #46
The chemical components of ribosomes are proteins and _______.
A.
All of thechoices are correct.
B.
rRNA
C.
tRNA
D.
mRNA
E.
None of thechoices is correct.
Question #47
A bacterial cell wall that has primarily peptidoglycan with small amounts of teichoic acid and lipoteichoic acid is _______.
A.
acid fast
B.
gram-positive
C.
found in archaea
D.
a spheroplast
E.
gram-negative
Question #48
The transfer of genes during bacterial conjugation involves rigid, tubular appendages called _______.
A.
fimbriae
B.
cilia
C.
periplasmic flagella (axial filaments)
D.
sex pili
E.
flagella
Question #49
When an endospore germinates, it develops into multiple vegetative cells ensuring reproductive success.
A.
FALSE
B.
TRUE
Question #50
Bacterial endospores are not produced by _______.
A.
All of thechoices are correct.
B.
Bacillus
C.
Clostridium
D.
Sporosarcina
E.
Staphylococcus
Question #51
The term that refers to the presence of flagella over the cell surface is _______.
A.
lophotrichous
B.
monotrichous
C.
amphitrichous
D.
atrichous
E.
peritrichous
Question #52
All of the following structures contribute to the ability of pathogenic bacteria to cause disease except the _______.
A.
fimbriae
B.
capsule
C.
LPS
D.
inclusions
E.
slime layer
Question #53
Plasmids ________.
A.
are often the site of pathogenic genes
B.
cannot be passed on to progeny
C.
cannot be passed between organisms
D.
are found in all bacteria
E.
are essential for growth and metabolism
Question #54
Which structure protects bacteria from being phagocytized by white blood cells?
A.
All of the choices are correct.
B.
Fimbriae
C.
Cell membrane
D.
Slime layer
E.
Capsule
Question #55
The short, numerous appendages used by some bacterial cells for adhering to surfaces are called _______.
A.
periplasmic flagella (axial filaments)
B.
cilia
C.
flagella
D.
sex pili
E.
fimbriae
Question #56
Which term is not used to describe bacterial cell shapes?
A.
Coccus
B.
Tetrad
C.
Vibrio
D.
Spirochete
E.
Rod
Question #57
The gram-positive cell wall is considered stronger than that of gram-negative cells since its hydrophobic outer membrane contains an endotoxin.
A.
FALSE
B.
TRUE
Question #58
Select characteristics exhibited by BOTH bacterial and eukaryotic cytoplasmic membranes.
A.
Phospholipid bilayer, Transport systems, Selectively permeable barrier, and Embedded proteins
B.
Transport systems, Selectively permeable barrier, and Sterols
C.
Sterols, Selectively permeable barrier, and Embedded proteins
D.
Sterols, Transport systems and Phospholipid bilayer
Question #59
When a eukaryotic cell is not undergoing mitosis, the DNA and its associated proteins appear as a visible network of dark fibers called the _____.
A.
nucleoplasm
B.
nucleosome
C.
nuclear envelope
D.
nucleolus
E.
chromatin
Question #60
There are nine peripheral pairs and one central pair of _______ found inside eukaryotic flagella and cilia.
A.
flagella
B.
cilia
C.
None of the choices are correct.
D.
filaments
E.
microtubules
Question #61
The cytoskeleton ________.
A.
provides support
B.
functions in movements of the cytoplasm
C.
All of the choices are correct.
D.
anchors organelles
E.
helps maintain cell shape
Question #62
During unfavorable growth conditions, many protozoa can convert to a resistant, dormant stage called a(n) ______.
A.
cyst
B.
trophozoite
C.
endospore
D.
seed
E.
sporozoa
Question #63
An organelle that is a stack of flattened, membranous sacs and functions to receive, modify, and package proteins for cell secretion is the ________.
A.
endoplasmic reticulum
B.
Golgi apparatus
C.
lysosome
D.
chloroplast
E.
mitochondria
Question #64
Eukaryotic flagella differ from bacterial flagella because only eukaryotic flagella ________.
A.
are long, whiplike structures
B.
facilitate chemotaxis
C.
contain microtubules
D.
are used for cell motility
E.
facilitate phototaxis
Question #65
Select all of the groups on this list that contain eukaryotic microorganisms.
A.
Bacteria, Viruses and Archaea
B.
Protozoa, Bacteria, Viruses and Archaea
C.
Protozoa, Bacteria, Viruses and Fungi
D.
Algae, Protozoa, Helminths, and Fungi
Question #66
The site for ribosomal RNA synthesis is the ______.
A.
ribosome
B.
Golgi apparatus
C.
lysosome
D.
nucleolus
E.
nucleus
Question #67
Most fungi obtain nutrients from dead plants and animals. These fungi are called _______.
A.
saprobes
B.
nonseptate
C.
substrates
D.
parasites
E.
dimorphic
Question #68
Fungi that grow as yeast at one temperature but will grow as mold at another temperature are called _______.
A.
pseudohyphae
B.
spores
C.
saprobes
D.
dimorphic
E.
parasites
Question #69
Select the organisms that typically have cell walls.
A.
Algae, Protozoa and Animals
B.
Algae, Plants, and Fungi
C.
Protozoa and Animals
D.
Fungi, Protozoa and Animals
Question #70
Histones are ________.
A.
proteins of the cytoskeleton
B.
proteins associated with DNA in the nucleus
C.
on the surface of rough endoplasmic reticulum
D.
found in polyribosomes
E.
enzymes found in lysosomes
Question #71
Which is mismatched?
A.
Plasmodium—protozoan that causes Chagas disease
B.
Giardia— causes intestinal distress; transmitted by feces in drinking water
C.
Histoplasma—fungus that causes Ohio Valley fever
D.
Naegleria—amoeba that causes brain infection
E.
Trichomonas—sexually transmitted vaginal infection
Question #72
Filamentous fungi are called _______.
A.
molds
B.
dimorphic
C.
septa
D.
mycelium
E.
pseudohyphae
Question #73
The motile, feeding stage of protozoa is called the _______.
A.
cyst
B.
sporozoite
C.
oocyst
D.
trophozoite
E.
food vacuole
Question #74
All of the following are found in some or all protozoa except ________.
A.
cell wall
B.
ectoplasm and endoplasm
C.
motility
D.
heterotrophic nutrition
E.
formation of a cyst stage
Question #75
Which is not a characteristic of fungi?
A.
Photosynthetic
B.
Have cell walls
C.
Heterotrophic nutrition
D.
Include single-celled and filamentous forms
E.
Can use a wide variety of nutrients
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