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.
Antonie van Leeuwenhoek
B.
Robert Koch
C.
Joseph Lister
D.
Louis Pasteur
E.
Francesco Redi
Question #2
All of the following are lipids except _____.
A.
phospholipid
B.
wax
C.
starch
D.
cholesterol
E.
triglyceride
Question #3
All microorganisms are best defined as organisms that ______.
A.
can only be found growing in laboratories
B.
cause human disease
C.
lack a cell nucleus
D.
are infectious particles
E.
are too small to be seen with the unaided eye
Question #4
Koch's postulates are criteria used to establish that ______.
A.
a specific microbe is the cause of a specific disease
B.
microbes are found on dust particles
C.
life forms can only arise from preexisting life forms
D.
microbes can be used to clean up toxic spills
E.
a specific microbe should be classified in a specific kingdom
Question #5
Cells, like bacteria and archaea, that do not have a nucleus in their cells have traditionally been called _____.
A.
prokaryotes
B.
eukaryotes
C.
decomposers
D.
fermenters
E.
pathogens
Question #6
When humans manipulate the genes of microorganisms, the process is called _____.
A.
genetic engineering
B.
bioremediation
C.
epidemiology
D.
immunology
E.
taxonomy
Question #7
Disease-causing microorganisms are called _____.
A.
pathogens
B.
decomposers
C.
fermenters
D.
prokaryotes
E.
eukaryotes
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.
Fungi
B.
Viruses
C.
Bacteria
D.
Parasites
E.
Helminths
Question #10
Select the correct descending taxonomic hierarchy:
A.
family, genus,species
B.
kingdom, domain,phylum
C.
class, phylum,order
D.
genus, species,family
E.
family, order,class
Question #11
The most prevalent worldwide infectious diseases are _____.
A.
malaria diseases
B.
respiratory diseases
C.
diarrheal diseases
D.
AIDS-related diseases
E.
measles
Question #12
Taxonomy does not involve _____.
A.
identification
B.
taxa
C.
common name
D.
classification
E.
nomenclature
Question #13
Which statement correctly compares the sizes of different microorganisms?
A.
Bacteria are larger than eukaryotic microorganisms
B.
Archaea are larger than eukaryotic microorganisms but smaller than bacteria
C.
Eukaryotic microorganisms are smaller than viruses
D.
Bacteria are larger 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.
FALSE
B.
TRUE
Question #16
Organic chemicals always have a basic framework of the element _____ bonded to other atoms.
A.
phosphorous
B.
nitrogen
C.
oxygen
D.
hydrogen
E.
carbon
Question #17
Helminths are _____.
A.
parasitic worms
B.
bacteria
C.
protozoa
D.
infectious particles
E.
molds
Question #18
A scientist studying the sequence of nucleotides in the rRNA of a bacterial species is working on ________.
A.
nomenclature
B.
determining if that species is the cause of a new disease
C.
recombinant DNA
D.
bioremediation
E.
determining evolutionary relatedness
Question #19
Nucleic acids have primary, secondary, tertiary, and quaternary levels of organization.
A.
TRUE
B.
FALSE
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.
fluorescence
B.
dark field
C.
bright field
D.
phase contrast
E.
electron
Question #22
Agar is a complex polysaccharide that comes from a(n) _____.
A.
algae
B.
green plant
C.
mold
D.
fungus
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.
Transport
B.
Blood
C.
General purpose
D.
EMB
E.
Thioglycollate
Question #24
Which type of microscope does not use light in forming the specimen image?
A.
Phase contrast
B.
Electron
C.
Dark field
D.
Fluorescence
E.
Bright field
Question #25
A nutrient medium that contains at least one ingredient that is NOT chemically definable would be termed _____.
A.
minimal
B.
synthetic
C.
enriched
D.
complex
E.
reducing
Question #26
Which of the following is not a benefit of agar as a solid medium?
A.
Is solid at room temperature
B.
Has flexibility
C.
Is digested by most microbes
D.
Can be inoculated and poured at a temperature that is not harmful
E.
Holds moisture
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 culture iscontaminated.
B.
The culturemedium must be differential.
C.
The culturemedium must be selective.
D.
Themicrobiologist used too much inoculum.
E.
The incubationtemperature was incorrect.
Question #28
The specimen preparation that is best for viewing cell motility is ______.
A.
hanging drop
B.
Gram stain
C.
negative stain
D.
flagellar 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.
Transmission electron
B.
Phase contrast
C.
Scanning 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.
simple staining
B.
using the acid-fast stain
C.
capsule staining
D.
negative staining
E.
using an acidic dye
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, Bright-field microscopy, Spread plate, Use of selective media,
D.
Gram stain, Loop dilution, Bright-field microscopy, 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.
Resolving power
C.
All of thechoices are correct.
D.
Magnification
E.
None of the choices are correct.
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.
Enumeration
B.
Reducing
C.
Selective
D.
Differential
E.
Enriched
Question #34
A common medium used for growing fastidious bacteria is ______.
A.
MacConkey medium
B.
trypticase soy agar
C.
mannitol salt agar
D.
a reducing medium
E.
blood agar
Question #35
All of the following pertain to the fluorescence microscope except ______.
A.
it is a type of compound microscope
B.
it is commonly used to diagnose certain infections
C.
it requires an ultraviolet radiation source
D.
it requires the use of dyes like acridine and fluorescein
E.
it uses electrons to produce a specimen image
Question #36
Which of the following is not an inoculating tool?
A.
Needle
B.
Loop
C.
Pipette
D.
Petri dish
E.
Swab
Question #37
Which of the following magnifies the specimen to produce its real image?
A.
Condenser
B.
Body
C.
Objective lens
D.
Ocular lens
E.
Nosepiece
Question #38
Bacteria that require special growth factors and complex nutrients are termed _____.
A.
microaerophilic
B.
autotrophic
C.
anaerobic
D.
fastidious
E.
aerobic
Question #39
A.
basal body
B.
hook
C.
outer membrane
D.
filament
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.
Gram-positivebacteria have an outer membrane.
C.
The innermost layer is a phospholipid bilayer.
D.
The uppermost layer is made of lipopolysaccharides.
E.
The lipid portionof the lipopolysaccharide layer is an endotoxin.
Question #41
Peptidoglycan is a unique macromolecule found in bacterial _______.
A.
cell membranes
B.
slime layers
C.
capsules
D.
inclusions
E.
cell walls
Question #42
Endospores are ________.
A.
resistant to destruction by radiation
B.
metabolically inactive
C.
living structures
D.
All of the choices are correct.
E.
resistant to heat and chemical destruction
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-positive organisms
C.
gram-negative organisms
D.
cyanobacteria
E.
mycoplasmas
Question #45
During the Gram stain, ______ cells decolorize when the alcohol is applied.
A.
gram-negative
B.
C.
both gram-positive and -negative
D.
gram-positive
Question #46
The chemical components of ribosomes are proteins and _______.
A.
None of thechoices is correct.
B.
rRNA
C.
tRNA
D.
All of thechoices are correct.
E.
mRNA
Question #47
A bacterial cell wall that has primarily peptidoglycan with small amounts of teichoic acid and lipoteichoic acid is _______.
A.
found in archaea
B.
a spheroplast
C.
gram-negative
D.
acid fast
E.
gram-positive
Question #48
A.
flagella
B.
fimbriae
C.
sex pili
D.
periplasmic flagella (axial filaments)
E.
cilia
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.
Sporosarcina
C.
Clostridium
D.
Staphylococcus
E.
Bacillus
Question #51
The term that refers to the presence of flagella over the cell surface is _______.
A.
amphitrichous
B.
peritrichous
C.
lophotrichous
D.
monotrichous
E.
atrichous
Question #52
All of the following structures contribute to the ability of pathogenic bacteria to cause disease except the _______.
A.
capsule
B.
fimbriae
C.
slime layer
D.
inclusions
E.
LPS
Question #53
Plasmids ________.
A.
cannot be passed between organisms
B.
are often the site of pathogenic genes
C.
cannot be passed on to progeny
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.
Slime layer
B.
All of the choices are correct.
C.
Capsule
D.
Cell membrane
E.
Fimbriae
Question #55
The short, numerous appendages used by some bacterial cells for adhering to surfaces are called _______.
A.
sex pili
B.
flagella
C.
fimbriae
D.
cilia
E.
periplasmic flagella (axial filaments)
Question #56
Which term is not used to describe bacterial cell shapes?
A.
Tetrad
B.
Spirochete
C.
Rod
D.
Vibrio
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, Transport systems and Phospholipid bilayer
C.
Sterols, Selectively permeable barrier, and Embedded proteins
D.
Phospholipid bilayer, Transport systems, Selectively permeable barrier, and Embedded proteins
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.
chromatin
D.
nucleolus
E.
nuclear envelope
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.
microtubules
E.
filaments
Question #61
The cytoskeleton ________.
A.
provides support
B.
All of the choices are correct.
C.
helps maintain cell shape
D.
functions in movements of the cytoplasm
E.
anchors organelles
Question #62
During unfavorable growth conditions, many protozoa can convert to a resistant, dormant stage called a(n) ______.
A.
cyst
B.
trophozoite
C.
seed
D.
sporozoa
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.
lysosome
B.
endoplasmic reticulum
C.
chloroplast
D.
Golgi apparatus
E.
mitochondria
Question #64
Eukaryotic flagella differ from bacterial flagella because only eukaryotic flagella ________.
A.
contain microtubules
B.
facilitate phototaxis
C.
are used for cell motility
D.
facilitate chemotaxis
E.
are long, whiplike structures
Question #65
Select all of the groups on this list that contain eukaryotic microorganisms.
A.
Protozoa, Bacteria, Viruses and Archaea
B.
Protozoa, Bacteria, Viruses and Fungi
C.
Bacteria, Viruses and Archaea
D.
Algae, Protozoa, Helminths, and Fungi
Question #66
The site for ribosomal RNA synthesis is the ______.
A.
Golgi apparatus
B.
lysosome
C.
nucleolus
D.
ribosome
E.
nucleus
Question #67
Most fungi obtain nutrients from dead plants and animals. These fungi are called _______.
A.
parasites
B.
nonseptate
C.
dimorphic
D.
saprobes
E.
substrates
Question #68
Fungi that grow as yeast at one temperature but will grow as mold at another temperature are called _______.
A.
dimorphic
B.
pseudohyphae
C.
saprobes
D.
spores
E.
parasites
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.
on the surface of rough endoplasmic reticulum
B.
found in polyribosomes
C.
proteins associated with DNA in the nucleus
D.
enzymes found in lysosomes
E.
proteins of the cytoskeleton
Question #71
Which is mismatched?
A.
Naegleria—amoeba that causes brain infection
B.
Trichomonas—sexually transmitted vaginal infection
C.
Giardia— causes intestinal distress; transmitted by feces in drinking water
D.
Plasmodium—protozoan that causes Chagas disease
E.
Histoplasma—fungus that causes Ohio Valley fever
Question #72
Filamentous fungi are called _______.
A.
mycelium
B.
molds
C.
dimorphic
D.
pseudohyphae
E.
septa
Question #73
The motile, feeding stage of protozoa is called the _______.
A.
food vacuole
B.
sporozoite
C.
oocyst
D.
trophozoite
E.
cyst
Question #74
All of the following are found in some or all protozoa except ________.
A.
formation of a cyst stage
B.
heterotrophic nutrition
C.
cell wall
D.
motility
E.
ectoplasm and endoplasm
Question #75
Which is not a characteristic of fungi?
A.
Can use a wide variety of nutrients
B.
Photosynthetic
C.
Include single-celled and filamentous forms
D.
Heterotrophic nutrition
E.
Have cell walls
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