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.
Robert Koch
B.
Louis Pasteur
C.
Joseph Lister
D.
Antonie van Leeuwenhoek
E.
Francesco Redi
Question #2
All of the following are lipids except _____.
A.
starch
B.
triglyceride
C.
wax
D.
phospholipid
E.
cholesterol
Question #3
All microorganisms are best defined as organisms that ______.
A.
are too small to be seen with the unaided eye
B.
are infectious particles
C.
cause human disease
D.
lack a cell nucleus
E.
can only be found growing in laboratories
Question #4
Koch's postulates are criteria used to establish that ______.
A.
microbes can be used to clean up toxic spills
B.
a specific microbe should be classified in a specific kingdom
C.
microbes are found on dust particles
D.
a specific microbe is the cause of a specific disease
E.
life forms can only arise from preexisting life forms
Question #5
Cells, like bacteria and archaea, that do not have a nucleus in their cells have traditionally been called _____.
A.
decomposers
B.
fermenters
C.
prokaryotes
D.
eukaryotes
E.
pathogens
Question #6
When humans manipulate the genes of microorganisms, the process is called _____.
A.
genetic engineering
B.
epidemiology
C.
taxonomy
D.
immunology
E.
bioremediation
Question #7
Disease-causing microorganisms are called _____.
A.
decomposers
B.
eukaryotes
C.
prokaryotes
D.
fermenters
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.
Bacteria
B.
Parasites
C.
Helminths
D.
Viruses
E.
Fungi
Question #10
Select the correct descending taxonomic hierarchy:
A.
genus, species,family
B.
family, genus,species
C.
kingdom, domain,phylum
D.
class, phylum,order
E.
family, order,class
Question #11
The most prevalent worldwide infectious diseases are _____.
A.
respiratory diseases
B.
measles
C.
malaria diseases
D.
AIDS-related diseases
E.
diarrheal diseases
Question #12
Taxonomy does not involve _____.
A.
classification
B.
taxa
C.
identification
D.
common name
E.
nomenclature
Question #13
Which statement correctly compares the sizes of different microorganisms?
A.
Bacteria are larger than viruses
B.
Archaea are larger than eukaryotic microorganisms but smaller than bacteria
C.
Bacteria are larger than eukaryotic microorganisms
D.
Eukaryotic microorganisms are smaller than viruses
Question #14
All proteins are enzymes.
A.
TRUE
B.
FALSE
Question #15
Most microorganisms that are found in and on humans do not cause harm and can sometimes benefit the host.
A.
TRUE
B.
FALSE
Question #16
Organic chemicals always have a basic framework of the element _____ bonded to other atoms.
A.
hydrogen
B.
carbon
C.
oxygen
D.
phosphorous
E.
nitrogen
Question #17
Helminths are _____.
A.
parasitic worms
B.
protozoa
C.
bacteria
D.
molds
E.
infectious particles
Question #18
A scientist studying the sequence of nucleotides in the rRNA of a bacterial species is working on ________.
A.
determining if that species is the cause of a new disease
B.
bioremediation
C.
nomenclature
D.
determining evolutionary relatedness
E.
recombinant DNA
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, Contrast, Specimen holder
B.
Adequate magnification, Contrast, Resolution
C.
Ability to observe cells in the living state, Use of wavelengths other than the visible spectrum, 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.
fluorescence
B.
electron
C.
phase contrast
D.
dark field
E.
bright field
Question #22
Agar is a complex polysaccharide that comes from a(n) _____.
A.
algae
B.
green plant
C.
fungus
D.
mold
E.
euglena
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.
General purpose
B.
EMB
C.
Transport
D.
Blood
E.
Thioglycollate
Question #24
Which type of microscope does not use light in forming the specimen image?
A.
Bright field
B.
Electron
C.
Fluorescence
D.
Phase contrast
E.
Dark field
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.
Holds moisture
B.
Has flexibility
C.
Can be inoculated and poured at a temperature that is not harmful
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.
The incubationtemperature was incorrect.
C.
The culturemedium must be differential.
D.
Themicrobiologist used too much inoculum.
E.
The culture iscontaminated.
Question #28
The specimen preparation that is best for viewing cell motility is ______.
A.
flagellar stain
B.
Gram stain
C.
hanging drop
D.
negative stain
E.
fixed stained smear
Question #29
Which type of microscope bombards a whole, metal-coated specimen with electrons moving back and forth over it?
A.
Scanning electron
B.
Phase contrast
C.
Transmission electron
D.
Differential interference contrast
E.
Fluorescence
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 the acid-fast stain
B.
simple staining
C.
capsule staining
D.
negative staining
E.
using an acidic dye
Question #31
Select the methods below that enable the isolation of bacteria.
A.
Gram stain, Loop dilution, Bright-field microscopy, Use of selective media,
B.
Loop dilution, Spread plate, Use of selective media, Quadrant streak plate
C.
Gram stain, Loop dilution, Spread plate, 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.
Refraction
B.
Magnification
C.
None of the choices are correct.
D.
All of thechoices are correct.
E.
Resolving power
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.
Selective
B.
Differential
C.
Reducing
D.
Enriched
E.
Enumeration
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 requires an ultraviolet radiation source
B.
it uses electrons to produce a specimen image
C.
it requires the use of dyes like acridine and fluorescein
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.
Pipette
C.
Loop
D.
Petri dish
E.
Needle
Question #37
Which of the following magnifies the specimen to produce its real image?
A.
Nosepiece
B.
Condenser
C.
Body
D.
Objective lens
E.
Ocular lens
Question #38
Bacteria that require special growth factors and complex nutrients are termed _____.
A.
anaerobic
B.
autotrophic
C.
aerobic
D.
fastidious
E.
microaerophilic
Question #39
A flagellum is anchored into the bacterial cell envelope by its _______.
A.
hook
B.
filament
C.
outer membrane
D.
basal body
E.
sheath
Question #40
Which of the following is not true of the outer membrane?
A.
The lipid portionof the lipopolysaccharide layer is an endotoxin.
B.
The porinproteins create channels through the outer membrane.
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.
cell walls
B.
inclusions
C.
slime layers
D.
capsules
E.
cell membranes
Question #42
Endospores are ________.
A.
resistant to destruction by radiation
B.
metabolically inactive
C.
All of the choices are correct.
D.
resistant to heat and chemical destruction
E.
living structures
Question #43
Each bacterial species represents a distinct organism that can produce viable offspring when mating with other bacteria of its kind.
A.
FALSE
B.
TRUE
Question #44
Lysozyme is most effective against _______.
A.
archaea
B.
gram-negative organisms
C.
cyanobacteria
D.
gram-positive organisms
E.
mycoplasmas
Question #45
During the Gram stain, ______ cells decolorize when the alcohol is applied.
A.
gram-positive
B.
gram-negative
C.
D.
both gram-positive and -negative
Question #46
The chemical components of ribosomes are proteins and _______.
A.
tRNA
B.
None of thechoices is correct.
C.
mRNA
D.
All of thechoices are correct.
E.
rRNA
Question #47
A bacterial cell wall that has primarily peptidoglycan with small amounts of teichoic acid and lipoteichoic acid is _______.
A.
gram-negative
B.
a spheroplast
C.
found in archaea
D.
acid fast
E.
gram-positive
Question #48
The transfer of genes during bacterial conjugation involves rigid, tubular appendages called _______.
A.
sex pili
B.
cilia
C.
fimbriae
D.
periplasmic flagella (axial filaments)
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.
Clostridium
B.
Staphylococcus
C.
All of thechoices are correct.
D.
Sporosarcina
E.
Bacillus
Question #51
The term that refers to the presence of flagella over the cell surface is _______.
A.
atrichous
B.
lophotrichous
C.
monotrichous
D.
peritrichous
E.
amphitrichous
Question #52
All of the following structures contribute to the ability of pathogenic bacteria to cause disease except the _______.
A.
inclusions
B.
slime layer
C.
capsule
D.
LPS
E.
fimbriae
Question #53
Plasmids ________.
A.
are found in all bacteria
B.
are often the site of pathogenic genes
C.
are essential for growth and metabolism
D.
cannot be passed on to progeny
E.
cannot be passed between organisms
Question #54
Which structure protects bacteria from being phagocytized by white blood cells?
A.
All of the choices are correct.
B.
Slime layer
C.
Cell membrane
D.
Capsule
E.
Fimbriae
Question #55
The short, numerous appendages used by some bacterial cells for adhering to surfaces are called _______.
A.
cilia
B.
flagella
C.
periplasmic flagella (axial filaments)
D.
fimbriae
E.
sex pili
Question #56
Which term is not used to describe bacterial cell shapes?
A.
Tetrad
B.
Rod
C.
Vibrio
D.
Spirochete
E.
Coccus
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.
TRUE
B.
FALSE
Question #58
Select characteristics exhibited by BOTH bacterial and eukaryotic cytoplasmic membranes.
A.
Transport systems, Selectively permeable barrier, and Sterols
B.
Sterols, Selectively permeable barrier, and Embedded proteins
C.
Phospholipid bilayer, Transport systems, 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.
nucleosome
B.
nucleoplasm
C.
nucleolus
D.
nuclear envelope
E.
chromatin
Question #60
There are nine peripheral pairs and one central pair of _______ found inside eukaryotic flagella and cilia.
A.
None of the choices are correct.
B.
microtubules
C.
flagella
D.
cilia
E.
filaments
Question #61
The cytoskeleton ________.
A.
All of the choices are correct.
B.
provides support
C.
functions in movements of the cytoplasm
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.
sporozoa
B.
seed
C.
cyst
D.
trophozoite
E.
endospore
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.
chloroplast
B.
endoplasmic reticulum
C.
mitochondria
D.
lysosome
E.
Golgi apparatus
Question #64
Eukaryotic flagella differ from bacterial flagella because only eukaryotic flagella ________.
A.
are long, whiplike structures
B.
facilitate chemotaxis
C.
are used for cell motility
D.
contain microtubules
E.
facilitate phototaxis
Question #65
Select all of the groups on this list that contain eukaryotic microorganisms.
A.
Algae, Protozoa, Helminths, and Fungi
B.
Protozoa, Bacteria, Viruses and Fungi
C.
Bacteria, Viruses and Archaea
D.
Protozoa, Bacteria, Viruses and Archaea
Question #66
The site for ribosomal RNA synthesis is the ______.
A.
nucleus
B.
ribosome
C.
nucleolus
D.
Golgi apparatus
E.
lysosome
Question #67
Most fungi obtain nutrients from dead plants and animals. These fungi are called _______.
A.
nonseptate
B.
saprobes
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.
spores
B.
saprobes
C.
parasites
D.
pseudohyphae
E.
dimorphic
Question #69
Select the organisms that typically have cell walls.
A.
Algae, Plants, and Fungi
B.
Fungi, Protozoa and Animals
C.
Protozoa and Animals
D.
Algae, Protozoa and Animals
Question #70
Histones are ________.
A.
found in polyribosomes
B.
on the surface of rough endoplasmic reticulum
C.
enzymes found in lysosomes
D.
proteins associated with DNA in the nucleus
E.
proteins of the cytoskeleton
Question #71
Which is mismatched?
A.
Giardia— causes intestinal distress; transmitted by feces in drinking water
B.
Trichomonas—sexually transmitted vaginal infection
C.
Plasmodium—protozoan that causes Chagas disease
D.
Histoplasma—fungus that causes Ohio Valley fever
E.
Naegleria—amoeba that causes brain infection
Question #72
Filamentous fungi are called _______.
A.
molds
B.
mycelium
C.
dimorphic
D.
septa
E.
pseudohyphae
Question #73
The motile, feeding stage of protozoa is called the _______.
A.
cyst
B.
oocyst
C.
food vacuole
D.
trophozoite
E.
sporozoite
Question #74
All of the following are found in some or all protozoa except ________.
A.
cell wall
B.
motility
C.
heterotrophic nutrition
D.
ectoplasm and endoplasm
E.
formation of a cyst stage
Question #75
Which is not a characteristic of fungi?
A.
Can use a wide variety of nutrients
B.
Have cell walls
C.
Photosynthetic
D.
Heterotrophic nutrition
E.
Include single-celled and filamentous forms
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