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WorksheetsMicrobiology 2420 - Lecture Exam 3
Total questions: 53
Worksheet time: 27mins
Viral host range is the
tissue types infected by a virus.
species that are infected by a virus.
geographical area of a virus.
temperature range that the virus can survive.
Which of the following is caused by a prion?
Giardiasis
Malaria
Zika
Mad Cow (variant CJD)
What type of radiation penetrates surfaces and is used for disinfection?
Microwaves
Ultraviolet
Ionizing
Visible
Which of the following is a prokaryote?
Archaea
Trypanosoma
Paramecium
Penicillium
Which path of genetic information do retroviruses use? (put the steps in order)
Protein
RNA (replicated)
DNA
RNA (from virus)
1,2,3,4
4,3,2,1
1,3,2,4
4.2.3.1
Cyanobacteria are
photoautotrophs.
saprophytes.
chemoheterotrophs.
photoheterotrophs.
Lysozyme is used by _________ to exit the host.
animal viruses.
prions.
parasitic protozoa.
bacteriophages.
A single fungal filament is a
mycelium.
septum.
hypha.
conidium.
Cellular life does not have
a cell membrane.
ribosomes.
metabolism.
capsids.
The most conserved DNA codes for ___________ and is useful in determining phylogenetic relationships.
glycolysis.
cell surface antigens.
ribosomal RNA.
antibiotic resistance.
Chemicals used to disinfect fomites (inanimate objects) are called _____.
antiseptics
disinfectants
germicides
sterilizers
Which of the following is found in eukaryotic cells and not prokaryotes?
Ribosomes
DNA
Mitochondria
Cytoplasm
Sterilization is the
inhibition of microbe growth on the skin.
sanitation of all cooking surfaces.
killing of all living microorganisms, spores, and viruses
killing of all pathogens, but not nonpathogens.
Some viruses have an envelope, the phospholipids of which come from
host cell membranes.
viral genes.
viral proteins.
host chromosomes.
A prokaryote with peptidoglycan in its cell wall belongs in Domain ________.
Monera
Bacteria
Archaea
Eukarya
Pasteurization is
heat killing all microbes with steam under pressure.
membrane filtration of viruses.
heat killing of potential pathogens.
inactivation of endospores.
The beneficial symbiosis between plant roots and fungi is called _____.
mycorrhizae
lichens
parasitism
rhizobium
Plasmodium spp. require two different hosts: the _________ host (mosquito) and the _________ host (human).
first; second
definitive; intermediate
trophozoite; cyst
inital; final
All fungi are _____________.
photoautotrophs
photoheterotrophs
chemoautotrophs
chemoheterotrophs
The stage of the viral lytic cycle when the viral genome enters the host cell is ____.
adsorption/attachment
penetration
biosynthesis
maturation/assembly
The two main stages in the life cycle of many parasitic protozoa are ________ and ________.
mold; yeast
trophozoite; cyst
vegetative cell; endospore
All of the above.
Prior to inserting an IV, the skin should be treated with a/an _____.
antiseptic
sanitizer
disinfectant
sterilizer
Which of these is the best evidence that mitochondria and chloroplasts were once free-living bacteria?
circular DNA
smaller bacteria-like ribosomes
divide by binary fission
all of these
Detergents such as quats are chemicals that kill by
disrupting lipids in cell membranes.
causing DNA mutations.
denaturing proteins in cells.
inhibiting cell wall synthesis.
A device that sterilizes by pressurized steam is a/an _____.
germicidal lamp
ethylene oxide chamber
incinerator
autoclave
The _____ are Gram negative bacteria that include enteric bacteria, plague, and cholera.
firmicutes
alphaproteobacteria
gammaproteobacteria
spirocheates
Which of these is NOT a phylum of gram-positive bacteria?
Proteobacteria
Firmicutes
Actinobacteria
All of these are gram-positive phyla.
What phylum contains gram-negative bacteria and several human enteric pathogens such as E. coli and Salmonella.
Firmicutes
Bacteroidetes
Proteobacteria
Rickettsia
Which supergroup of includes protozoa that use pseudopods for locomotion and to capture prey?
Unikonta
Excavata
Archaea
SAR
Which of these is NOT a human oncovirus?
Human papilloma virus
Hepatitis B virus
Zika virus
Human T-cell Lymphotrophic virus-1
Moist heat kills living microbes by _______ and at _______ temperatures than dry heat.
dissolving membranes; lower
incinerating DNA; higher
denaturing proteins; lower
oxidizing organic molecules; higher
Reproduction in fungi involves forming _______ by _______________ reproduction.
cysts; asexually; only sexual
endospores; only asexual
spores; only asexual
spores; asexual or sexual
The fungi that bear spores on mushrooms and also include rusts and smuts are _____.
Ascomycota
Basidiomycota
Zygomycota
Chytridiomycota
____ filters are used to purify air in hospitals.
Germicidal
Biological safety
HEPA
Ultraviolet
Domain Archaea consists of prokaryotes that are often referred to as ____________.
extremophiles
pathogens
gram-negatives
photoautotrophs
Which phylum of bacteria includes soil organisms that produce antibiotics?
firmicutes
proteobacteria
actinobacteria
cyanobacteria
A microbe that produces methane in anoxygenic environments is a member of the __________.
Proteobacteria
Bacteriodetes
Firmicutes
Euryarcheota
Fungi that are yeasts at 37oC and molds at 25oC are _________.
anamorphic
dimorphic
saprobes
coenocytic
Protozoa having a complex of organelles at the tip for penetrating cells, such as Plasmodium spp., are _______.
ciliates
kinetoplastids
apicomplexans
amoebozoa
Sexual reproduction occurs in the __________ host (mosquito) in the life cycle of Plasmodium.
primary
intermediate
definitive
sexual
The provirus __________.
is bacteriophage DNA inserted into the bacterial chromosome
has triggered cancer formation
has inserted its DNA into the host chromosome of an animal cell
is responsible for lysing the host cell
Halogens kill cells by
mutating DNA.
disrupting membranes.
oxidizing other molecules.
denaturing proteins.
Alcohols may act as antiseptics, because they
interfere with protein synthesis.
disrupt cell membranes and viral envelopes and denature proteins.
Mutate DNA and contain phenolic compounds.
oxidizes proteins and contain heavy metals.
Incineration, a form of dry heat, kills by
burning (rapidly oxidizing) biomolecules.
crosslinking proteins.
burning fats.
mutating DNA.
Which is a method to test disinfectant/antiseptic effectiveness?
Ames test
electron microscopy
standard plate count
disk diffusion method
Bacillus and Clostridium belong to the phylum ____.
Bacteroidetes
Firmicutes
Proteobacteria
Spirochaetes
Drying preserves food because:
microbes live in water.
water is required for metabolism.
cells secrete water.
drying makes food acidic.
What type of radiation causes thymine dimers, but cannot penetrate most materials?
gamma rays
ionizing radiation
ultraviolet
microwaves
In modern taxonomy, the Tree of Life represents:
evolutionary relationships.
shared anatomy.
the type of nucleic acid.
biochemical characteristics.
The origins of the mitochondrion and the chloroplast are best explained by ___________?
The Central Dogma.
the Tree of Life.
endosymbiont theory.
the formation of the endomembrane system in eukaryotic cells.
Which of these treatments will kill bacterial endospores?
pasteurization
121°C for 30 min. in autoclave
detergent
alcohol
What are the cell walls of fungi composed of?
peptidoglycan
cellulose
chitin
Any of the above.
Chemical disinfectants are affected by:
temperature.
concentration.
microbial numbers
All of the above.
