BIO 215 Exam 4 UPDATED Exam Questions
and CORRECT Answers
Acid-fast - CORRECT ANSWER - the ability to resist decolorization by acid during
staining.
What species of bacteria cause whooping cough? - CORRECT ANSWER - Bordetella
pertussis
What is the main mechanism of action through which the virulence factors of Mycobacterium
tuberculosis act? - CORRECT ANSWER - prevent the destruction by lysosomes and
macrophages of host cells
Aerobic, gram-negative, non-enteric bacilli share what common feature? - CORRECT
ANSWER - Lipopolysaccharide (LPS)
Bacilli of which genus are considered acid-fast? - CORRECT ANSWER - Mycobacterium
What genus is associated with the organism that causes botulism? - CORRECT
ANSWER - Clostridium
Which type of environment is required for vegetative cells of Clostridium tetani to grow to
release their toxin? - CORRECT ANSWER - an anaerobic environment
What virulence factor does Clostridium difficile produce that is responsible for damage to the
intestines? - CORRECT ANSWER - enterotoxin
Are members of the Bacillus genus endospore forming? - CORRECT ANSWER - yes
, 3 Major virulence factors of the Streptococcus genus - CORRECT ANSWER - slime
layers, capsules, and hemolysins
Do species within the staphylococci genus form spore? - CORRECT ANSWER - no
Is the oxidase test appropriate for gram + or gram - ? - CORRECT ANSWER - gram
negative
What is the genus of bacteria that causes dysentery? - CORRECT ANSWER - Shigella
Which bacteria is implicated with drug-resistant MRSA? - CORRECT ANSWER -
Staphylococcus aureus
What is the cellular respiration requirement of species in the clostridium species? - CORRECT
ANSWER - obligate anaerobes
Which singular biochemical test is used to distinguish staphylococci and streptococci bacteria? -
CORRECT ANSWER - catalase test
What is the cellular respiration requirement of the species Staphylococcus aureus? - CORRECT
ANSWER - facultative anaerobe
How doe hemolysins confer their virulence on host cells? - CORRECT ANSWER - lyse
red blood cells
Do bacteria is the clostridium species form endospores? - CORRECT ANSWER - yes
Which type of bacteria can ferment lactose? - CORRECT ANSWER - coliforms
and CORRECT Answers
Acid-fast - CORRECT ANSWER - the ability to resist decolorization by acid during
staining.
What species of bacteria cause whooping cough? - CORRECT ANSWER - Bordetella
pertussis
What is the main mechanism of action through which the virulence factors of Mycobacterium
tuberculosis act? - CORRECT ANSWER - prevent the destruction by lysosomes and
macrophages of host cells
Aerobic, gram-negative, non-enteric bacilli share what common feature? - CORRECT
ANSWER - Lipopolysaccharide (LPS)
Bacilli of which genus are considered acid-fast? - CORRECT ANSWER - Mycobacterium
What genus is associated with the organism that causes botulism? - CORRECT
ANSWER - Clostridium
Which type of environment is required for vegetative cells of Clostridium tetani to grow to
release their toxin? - CORRECT ANSWER - an anaerobic environment
What virulence factor does Clostridium difficile produce that is responsible for damage to the
intestines? - CORRECT ANSWER - enterotoxin
Are members of the Bacillus genus endospore forming? - CORRECT ANSWER - yes
, 3 Major virulence factors of the Streptococcus genus - CORRECT ANSWER - slime
layers, capsules, and hemolysins
Do species within the staphylococci genus form spore? - CORRECT ANSWER - no
Is the oxidase test appropriate for gram + or gram - ? - CORRECT ANSWER - gram
negative
What is the genus of bacteria that causes dysentery? - CORRECT ANSWER - Shigella
Which bacteria is implicated with drug-resistant MRSA? - CORRECT ANSWER -
Staphylococcus aureus
What is the cellular respiration requirement of species in the clostridium species? - CORRECT
ANSWER - obligate anaerobes
Which singular biochemical test is used to distinguish staphylococci and streptococci bacteria? -
CORRECT ANSWER - catalase test
What is the cellular respiration requirement of the species Staphylococcus aureus? - CORRECT
ANSWER - facultative anaerobe
How doe hemolysins confer their virulence on host cells? - CORRECT ANSWER - lyse
red blood cells
Do bacteria is the clostridium species form endospores? - CORRECT ANSWER - yes
Which type of bacteria can ferment lactose? - CORRECT ANSWER - coliforms
