1|Page
BIO 320 EXAM 1 NEWEST 2025/2026 ACTUAL EXAM
COMPLETE 100 QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) ||VERIFIED EXAM!!! |ALREADY GRADED
A+||LATEST EXAM!!!
Which of the following bacterial genera does not produce
endospores?
Bacillus
Staphylococcus
Clostridium
Sporosarcina - ANSWER-Staphylococcus
Substances are transported across the outer membrane of
Gram negative bacteria using:
porins
teichoic acids
the proton motive force
LPS
ATP - ANSWER-porins
As an antibiotic, Penicillin is the most effective on:
actively growing Gram positive bacteria
stationary-phase (non-dividing) Gram postive bacteria
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Mycoplasma bacteria
actively growing Gram negative bacteria
stationary-phase (non-dividing) Gram negative bacteria -
ANSWER-actively growing Gram positive bacteria
Indicate all of statements below that are features of a
bacterial capsule.
it is considered a pathogenecity/virulence factor
it can be detected using the negative stain procedure
it contains lipopolysaccharide
it may protect the bacteria from engulfment by white blood
cells (macrophages)
it is found on all species of bacteria - ANSWER-it is
considered a pathogenecity/virulence factor
it can be detected using the negative stain procedure
it may protect the bacteria from engulfment by white blood
cells (macrophages)
The toxic effects of systemic LPS to a human host....
a due to a direct toxicity of LPS on eukaryotic cells
can be localized to the O-polysaccharide part of the
molecule
are mediated by LPS-activated immune cells
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are mild and barely noticeable
only occur when LPS is on a living bacterium - ANSWER-
are mediated by LPS-activated immune cells
Which is true regarding the locomotion/movement of
bacteria? It .....
can be seen on a Gram stain
is unidirectional (straight) and very efficient
is accomplished through the coordinated action of pilli
attachment
is powered by the Proton Motive Force
is a property of all bacterial species - ANSWER-is
powered by the Proton Motive Force (PMF)
Indicate all of the following features which are associated
with endotoxin:
relatively heat resistant
composed of protein
ubiquitous in the environment
produced by all bacterial species
only found in endospores
can be an inducer of septic shock - ANSWER-relatively
heat resistant
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ubiquitous in the environment
can be an inducer of septic shock
What is the Svedberg (mass) designation [___S] given to
an assembled prokaryotic ribosome? - ANSWER-70S
According to the video and text, which protozoan group
contains the fewest human pathogen species?
Ciliophora (cilliated)
Mastigophera (flagellated)
Apicomplexans (non-motile)
Sarcodinia (amoeboid)
None of the above contain human pathogens - ANSWER-
Ciliophora (cilliated)
Which of the following is a common feature to protozoa
and fungi, but not algae?
motile
heterotrophic
multicelluar
eukaryotic
hard cell walls - ANSWER-heterotrophic
BIO 320 EXAM 1 NEWEST 2025/2026 ACTUAL EXAM
COMPLETE 100 QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) ||VERIFIED EXAM!!! |ALREADY GRADED
A+||LATEST EXAM!!!
Which of the following bacterial genera does not produce
endospores?
Bacillus
Staphylococcus
Clostridium
Sporosarcina - ANSWER-Staphylococcus
Substances are transported across the outer membrane of
Gram negative bacteria using:
porins
teichoic acids
the proton motive force
LPS
ATP - ANSWER-porins
As an antibiotic, Penicillin is the most effective on:
actively growing Gram positive bacteria
stationary-phase (non-dividing) Gram postive bacteria
,2|Page
Mycoplasma bacteria
actively growing Gram negative bacteria
stationary-phase (non-dividing) Gram negative bacteria -
ANSWER-actively growing Gram positive bacteria
Indicate all of statements below that are features of a
bacterial capsule.
it is considered a pathogenecity/virulence factor
it can be detected using the negative stain procedure
it contains lipopolysaccharide
it may protect the bacteria from engulfment by white blood
cells (macrophages)
it is found on all species of bacteria - ANSWER-it is
considered a pathogenecity/virulence factor
it can be detected using the negative stain procedure
it may protect the bacteria from engulfment by white blood
cells (macrophages)
The toxic effects of systemic LPS to a human host....
a due to a direct toxicity of LPS on eukaryotic cells
can be localized to the O-polysaccharide part of the
molecule
are mediated by LPS-activated immune cells
,3|Page
are mild and barely noticeable
only occur when LPS is on a living bacterium - ANSWER-
are mediated by LPS-activated immune cells
Which is true regarding the locomotion/movement of
bacteria? It .....
can be seen on a Gram stain
is unidirectional (straight) and very efficient
is accomplished through the coordinated action of pilli
attachment
is powered by the Proton Motive Force
is a property of all bacterial species - ANSWER-is
powered by the Proton Motive Force (PMF)
Indicate all of the following features which are associated
with endotoxin:
relatively heat resistant
composed of protein
ubiquitous in the environment
produced by all bacterial species
only found in endospores
can be an inducer of septic shock - ANSWER-relatively
heat resistant
, 4|Page
ubiquitous in the environment
can be an inducer of septic shock
What is the Svedberg (mass) designation [___S] given to
an assembled prokaryotic ribosome? - ANSWER-70S
According to the video and text, which protozoan group
contains the fewest human pathogen species?
Ciliophora (cilliated)
Mastigophera (flagellated)
Apicomplexans (non-motile)
Sarcodinia (amoeboid)
None of the above contain human pathogens - ANSWER-
Ciliophora (cilliated)
Which of the following is a common feature to protozoa
and fungi, but not algae?
motile
heterotrophic
multicelluar
eukaryotic
hard cell walls - ANSWER-heterotrophic
