WorksheetsBiol 208 exam 1 review
Total questions: 84
Worksheet time: 46mins
Edward Jenner is known for
inventing the microscope
giving the first vaccines against small pox
being the first to record medical statistics
seeing the first cells
Which of the following demonstrates correct scientific notation of a bacterial organism?
Staphylococcus Epidermidis
Staphylococcus epidermidis
Staphylococcus epidermidis
Staphylococcus Epidermidis
aseptic means
frozen
dirty
free of microbes
full of microbes
the first life forms on earth were
alien
dinosaurs
microscopic
cave dwellers
Which of the following are considered a beneficial product of microorganisms (check all that apply)
nitrogen fixation
production of fermented foods
synthesis of vitamins
causative agents of disease
producing oxygen
Which of the following would you expect to find inhabiting the human digestive tract? (check all that apply)
yeast
algae
bacteria
intestinal viruses
Which of the following methods for classifying life forms is MOST accurate in distinguishing between two closely related rod-shaped bacterial organisms?
physical characteristics
method of reproduction
DNA sequence comparison
environmental habitat
gram staining
Robert Hooke is known for
inventing the microscope
giving the first vaccines against small pox
being the first to record medical statistics
seeing the first cells
which of the following apply to prokaryotes (check all that apply)
bacteria and archae
DNA lacking a nuclear membrane
small size (0.2-10 um)
plant cells
membrane bound organelles
which of the following apply to eukaryotes (check all that apply)
bacteria and archae
DNA inside a nucleus
large size size (up to 1 mm)
plant cells
membrane bound organelles
Both viruses and cells always contain
membranes
nucleic acid
DNA
ribosomes
Some parasitic worms do not fit the normal definition of microbes, as they are large enough to be seen without the aid of a microscope. Are they still considered microbes?
Yes, because they can infect people
Yes, because they are transmitted like microbes
Yes, because they do not fit in another category
No, they are not considered microbes
an antibiotic that targets the ribosomes of the pathogen would not be effective against a:
bacteria
yeast
virus
mold
Which of these statements are part of the germ theory of disease? (check all that apply)
A specific microbe causes a specific disease
Disease is often a result of breathing smoke or chemically polluted air.
Disease can be linked to a transmissible entity.
Quarantine can help slow the spread of disease.
disease is often a result of homeostatic imbalance
which microbe cannot be grown in pure culture on an agar petri dish and is small enough to pass through a tiny pored filter?
bacteria
yeast
virus
mold
A microbial growth medium for Staphylococcus aureus is prepared with a high salt concentration to minimize the growth of many organisms that are not capable of growth in these conditions. This is an example of
animal culture.
endosymbiosis.
pure culture.
selective medium.
Which of the following are Koch's postulates? (check all that apply)
Pathogen isolated from diseased host
Pathogen grown in pure culture
pathogens can be spontaneously generated
Pathogen introduced into healthy host—disease occurs
Same pathogen is isolated from newly diseased host
organisms that feed solely on inorganic molecules are known as
nitrogen fixers
lithotrophs
endosymbionts
biofilm participants
Which of the following are example of endosymbiosis (check all that apply)
rhizobial bacteria growing in the root nodules of certain plants
microorganisms in the digestive system of the cow degrading cellulose
bacteria in termite intestines digesting plant polymers
Bacillus anthracis spores present in the soil of cattle farms
cyanobacteria taken up by a eukaryote becoming a chloroplast
Which of the following statements provides evidence in support of the endosymbiotic origin of eukaryotic cells?(check all that apply)
The DNA sequence of mitochondria is similar to the DNA sequence of respiring bacteria.
The DNA of chloroplasts is circular like the DNA of phototrophic bacteria.
There is a lot of sequence homology between the DNA sequences of chloroplasts and phototrophic bacteria.
mitochondria can live freely outside a eukaryotic cell
Midi-chlorians live in all our cells
T/F The human body contains 10 times as many microbes as it does human cells
True
false
T/F most microbes cause disease
True
false
_____ link a pathogen with a disease
epidemiology
Koch's postulates
anecdotal evidence
geochemical cycling
a microbe that causes disease is known as a/n
pathogen
opportunistic
latent
lethal
the number of bacteria or virus particle required to kill 50% of an experimental group of animal hosts is known as the
LD50
ID50
invasion factor
virulence factor
the number of bacteria or virus particle required to cause disease symptoms in 50% of an experimental group of animal hosts is known as the
LD50
ID50
invasion factor
virulence factor
the ability of a pathogen to rapidly spread through tissue is known as
emergence
invasiveness
pathogenicity
virulence
a measure of the degree or severity of a disease is
emergence
invasiveness
pathogenicity
virulence
which of the following would help prevent disease (check all that apply)
proper hygeine
getting plenty of sleep
getting enough exercise
being very young
being very old
a relationship that is beneficial to both organisms is known as
mutualistic
pathogenic
ectoparasitic
endoparasitic
an organism that trasmits a viral pathogen into humans would be known as a
fomite
symptom
vector
reservoir
which of the following must succesful pathogens do (check all that apply)
host attachment
immune avoidance
nutrient acquisituion
have a narrow host range
something that can be observed by a person examining a patient is known as a
symptom
sign
syndrome
pathogen
something that can that can be felt only by the patient is known as a
symptom
sign
syndrome
pathogen
a collection of signs and symptoms that occur together and signify a particular disease or infectin is known as a
symptom
sign
syndrome
pathogen
something that causes disease in a previously healthy individual would be known as a
primary pathogen
nosocomial infection
opportunistic pathogen
chronic pathogen
the time after the microbe first infects a host but before the first signs of disease is knowns as
incubation
prodromal
illness
decline
convalescence
the short period of vague symptoms and malaise; can serve as a warning of more symptoms to come but may not be noticed is knowns as
incubation
prodromal
illness
decline
convalescence
Typical symptoms and signs of the disease appear and fever may be present in this phase
incubation
prodromal
illness
decline
convalescence
Symptoms begin to subside; fever resolves in this phase
incubation
prodromal
illness
decline
convalescence
the period after symptoms disappear and patient recovers is knowns as
incubation
prodromal
illness
decline
convalescence
______ is the point where disease is most severe.
incubation
prodromal
illness
decline
acme
A mosquito can transmit a viral pathogen into humans. What is the mode of transmission is this?
oral
respiratory
fecal-oral
parenternal
Sam used the bathroom and did not wash his hands thoroughly. Then he went to the breakroom and got coffee and donuts. Sally got coffee and donuts after Sam. Sally is sick the next day. What type of transmission was this?
oral
respiratory
fecal-oral
parenternal
always present in a community and seen at a low rate; often harbored in an animal reservoir
endemic
epidemic
pandemic
emerging
many cases developing in a community in a short time
endemic
epidemic
pandemic
emerging
an epidemic that spreads worldwide
endemic
epidemic
pandemic
emerging
infections that normally afflict animals but can be transmitted to humans
endemic
epidemic
pandemic
zoonotic
when a disease spreads from person to person via intimate contact this is known as
a simple infection cycle
a complex infection cycle.
indirect transmission
vector transmission
any organism that colonizes and harms its host is known as a
primary pathogen
nosocomial infection
opportunistic pathogen
parasite
Gram-positive bacteria appear ____ after a Gram stain
pink
blue
purple
yellow
Gram-negative bacteria appear ____ after a Gram stain
pink
blue
purple
yellow
The cell wall of Gram-negative bacteria contain(s)
a single layer of peptidoglycan
multiple layers of peptidoglycan
multiple layers of lipopolysaccharides
a single layer of lipopolysaccharides
______________ is the smallest distance by which two objects can be separated and still be distinguished.
magnification
resolution
wavelength
clarification
Regions of the EMS are defined by ____________,
the distance between one peak of a wave and the next peak.
magnification
resolution
wavelength
clarification
_______ of light through a medium of high refractive index, such as a glass lens, can cause magnification.
scattering
Refraction
absorption
reflection
A(n) __________ microscope is used to observe specific fluorescent-labeled structures.
compound light
phase-contrast
fluorescence
electron
The purpose of the condenser is to
focus light rays onto the slide
magnify the image from the objective lens
decrease the refractive index
improve the intensity of light
In __________ microscopy, fluorescent-labeled cellular structures can be identified
fluorescence
light microscopy
phase-contrast microscopy
Electron microscopy
In ____________ microscopy, organelles appear as light/dark patterns caused by variation in refractive indexes
fluorescence
light microscopy
phase-contrast microscopy
Electron microscopy
__________ microscopy uses electrons to visualize the specimen
fluorescence
light microscopy
phase-contrast microscopy
Electron microscopy
light microscopy can magnify things a maximum of
10X
100X
1000X
10,000X
__________ would be needed to visualize a virus.
fluorescence microscopy
light microscopy
phase-contrast microscopy
Electron microscopy
in ______ the condenser contains an opaque disk
that blocks transmitted light; background is dark.
fluorescence microscopy
light microscopy
phase-contrast microscopy
dark field microscopy
What defines the existence of a
cell?
(a)
give the functions of bacterial membrane proteins (check all that apply)
Structural support
detecting environmental signals
Secreting virulence factors &
communication signals
Transport across the cell membrane
Energy storage and transfer
_______ are found in the bacterial cell wall and are good targets for antibiotics
ribosomes
peptidoglycans
phospholipids
protein
_____ moves chemicals down their concentration gradient
passive transport
active transport
ABC protein
siderophores
The ______________ makes a bacterial cell rigid and helps it withstand intracellular turgor pressure that can build
up as a result of osmotic shock.
flagella
cell wall
plasma membrane
pili
Long chains consisting of repeating units
of (NAG) and (NAM) linked by short
peptide cross bridges are called:
peptidoglycans
flagella
pili
adherins
The transpeptidase that cross-links the
peptides is the target of __________________.
penicillin
vancomycin
tetracycline
amoxicillin
Bacterial DNA is found in the
nucleus
flagella
nucleoid
In bacterial DNA replication, Replication begins at the ________ and proceeds in both directions all around the circle.
origin
promoter
enhancer
start codon
Rotary _________ enable motility and chemotaxis.
pili
flagella
thylakoids
magnetosomes
_____enable bacteria to carry out photosynthesis
pili
flagella
thylakoids
magnetosomes
_____enable bacteria to attach to substrates and can transfer DNA between 2 cells
pili
flagella
thylakoids
magnetosomes
_____enable bacteria to swim along a magnetic field
pili
flagella
thylakoids
magnetosomes
_____enable bacteria to retrieve iron from the environment.
siderophores
flagella
thylakoids
magnetosomes
Network of proteins that determine the
shape of the eukaryotic cell
mitochondria
cytoskeleton
flagella
ribosome
Site of protein synthesis
rough ER
smooth ER
lysosome
golgi apparatus
Sequesters substances away from
cytoplasm
rough ER
smooth ER
lysosome
golgi apparatus
Membranous organelle containing enzymes that kill bacteria and process organic material for nutrition
rough ER
smooth ER
lysosome
golgi apparatus
Target proteins for various
destinations in the cell
rough ER
smooth ER
lysosome
golgi apparatus
which organelles provide energy for the cell? (check all that apply)
Mitochondria
nucleus
chloroplasts
flagella
