BIOD 171 Module 5 Exam Questions And
100 % Correct Answers Latest 2025:
Essential Microbiology - Portage
Learning/Guaranteed Pass
, Define the concept of universal precautions. - CORRECT ANSWER and all samples,
whether known or unknown, are to be treated as potentially hazardous/pathogenic
What would a researcher be certain to note while analyzing a microbial sample? -
CORRECT ANSWER-Size and shape, observable motility, Gram status, any chemical
reactions, changes in color in the organism or media, capture/draw any of these
characteristics
Which non-selective yet differential agar plate should be used if a Streptococcus sample
is suspected? - CORRECT ANSWER-Blood agar
What disease can result if a patient with streptococcal pharyngitis goes untreated? -
CORRECT ANSWER: rheumatic fever
Streptococcus, E. coli, pseudomonas, and klebsiella are all capable of causing what
disease? - CORRECT ANSWER-septicemia (blood poisoning)
What is a facultative anaerobe? - CORRECT ANSWER- an organism that can grow
aerobically or an anaerobically
A bacterial swab is taken from a patient with impetigo and streaked across an MSA
plate. Following incubation at 37C, what will be the color of the agar? - CORRECT
ANSWER-from red to yellow
If a patient were suspected of having tuberculosis (TB), which differential stain would
you select and why? - CORRECT ANSWER-Acid fast stain. TB shows a weak Gram
stain, acid fast stain for better visualization
According to the module, which mycobacterium infection will be treated free of charge
by the World Health Organization (WHO)? - CORRECT ANSWER-leprosy
What are the three main conditions caused by the botulism toxin? - CORRECT
ANSWER-foodborne, infant, wound
Why are infants (< 6 months) more susceptible to botulism? - CORRECT ANSWER-
their intestinal tracts are still maturing and don't yet contain adult microbiota, bacteria
can more easily colonize and produce
What is the mechanism of action of the toxin produced by Clostridium tentani (tetanus)?
- CORRECT ANSWER-Acts on inhibitory neurons causing systemic muscle stiffness
and spasms. can be observed in the jaw (lockjaw) or spread systemically to muscles
relating to respiratory function.
100 % Correct Answers Latest 2025:
Essential Microbiology - Portage
Learning/Guaranteed Pass
, Define the concept of universal precautions. - CORRECT ANSWER and all samples,
whether known or unknown, are to be treated as potentially hazardous/pathogenic
What would a researcher be certain to note while analyzing a microbial sample? -
CORRECT ANSWER-Size and shape, observable motility, Gram status, any chemical
reactions, changes in color in the organism or media, capture/draw any of these
characteristics
Which non-selective yet differential agar plate should be used if a Streptococcus sample
is suspected? - CORRECT ANSWER-Blood agar
What disease can result if a patient with streptococcal pharyngitis goes untreated? -
CORRECT ANSWER: rheumatic fever
Streptococcus, E. coli, pseudomonas, and klebsiella are all capable of causing what
disease? - CORRECT ANSWER-septicemia (blood poisoning)
What is a facultative anaerobe? - CORRECT ANSWER- an organism that can grow
aerobically or an anaerobically
A bacterial swab is taken from a patient with impetigo and streaked across an MSA
plate. Following incubation at 37C, what will be the color of the agar? - CORRECT
ANSWER-from red to yellow
If a patient were suspected of having tuberculosis (TB), which differential stain would
you select and why? - CORRECT ANSWER-Acid fast stain. TB shows a weak Gram
stain, acid fast stain for better visualization
According to the module, which mycobacterium infection will be treated free of charge
by the World Health Organization (WHO)? - CORRECT ANSWER-leprosy
What are the three main conditions caused by the botulism toxin? - CORRECT
ANSWER-foodborne, infant, wound
Why are infants (< 6 months) more susceptible to botulism? - CORRECT ANSWER-
their intestinal tracts are still maturing and don't yet contain adult microbiota, bacteria
can more easily colonize and produce
What is the mechanism of action of the toxin produced by Clostridium tentani (tetanus)?
- CORRECT ANSWER-Acts on inhibitory neurons causing systemic muscle stiffness
and spasms. can be observed in the jaw (lockjaw) or spread systemically to muscles
relating to respiratory function.
