BIOD 171 Portage Learning Exam 5
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Define the concept of universal precautions. - CORRECT ANSWER - Any samples,
known or unknown are to be treated as hazardous materials.
What would a researcher be certain to note while analyzing a microbial sample? - CORRECT
ANSWER - Size, shape, motility, gram status, presence of chemical reactions, changes in
color, capture images
Which non-selective yet differential agar plate should be used if a Streptococcus sample is
suspected? - CORRECT ANSWER - BAP
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 - All are capable of causing septicemia. Blood poisoning.
What is a facultative anaerobe? - CORRECT ANSWER - A facultative anaerobe is
capable of growth under both aerobic and anaerobic conditions.
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 -
The agent is staph aureus. Fermentation will lower the pH and change the dye from red to
yellow.
If a patient were suspected to have tuberculosis, which differential stain would you select and
why? - CORRECT ANSWER - Acid-fast stain to visualize the microbe.
, According to the module, which mycobacterium infection will be treated free of charge by the
WHO? - CORRECT ANSWER - Leprosy
What are the three main conditions caused bye the botulism toxin? - CORRECT
ANSWER - Foodborne, infant, wound.
Why are infants more susceptible to botulism? - CORRECT ANSWER - They are still
maturing and lack of adult microbiota.
What is the mechanism of action of the toxin produced by clostridium tenani? - CORRECT
ANSWER - It causes muscle stiffness and spasms.
What Gram-negative bacterium might come into contact with in a unsanitary hot tub. -
CORRECT ANSWER - Legionella
What are the three forms of plague and what regions do they affect? - CORRECT
ANSWER - Bubonic, pneumonic, septicemic.
According to the module, which STD might be best identified via dark field microscopy? -
CORRECT ANSWER - Syphilis
The concept of treating all samples, whether known or unknown, as potentially hazardous (or
pathogenic) materials is known as __________. - CORRECT ANSWER - Universal
precautions
While observing an unknown sample of limited amounts, a researcher must determine the
following observations, 1. the presence of any motility and 2. its gram status using the same
sample. The liquid sample cannot be divided. Which would you determine first and why? -
CORRECT ANSWER - The motility should be determined first. Observing motility
requires a wet mount. Gram staining requires heat and heat kills the bacteria.
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Define the concept of universal precautions. - CORRECT ANSWER - Any samples,
known or unknown are to be treated as hazardous materials.
What would a researcher be certain to note while analyzing a microbial sample? - CORRECT
ANSWER - Size, shape, motility, gram status, presence of chemical reactions, changes in
color, capture images
Which non-selective yet differential agar plate should be used if a Streptococcus sample is
suspected? - CORRECT ANSWER - BAP
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 - All are capable of causing septicemia. Blood poisoning.
What is a facultative anaerobe? - CORRECT ANSWER - A facultative anaerobe is
capable of growth under both aerobic and anaerobic conditions.
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 -
The agent is staph aureus. Fermentation will lower the pH and change the dye from red to
yellow.
If a patient were suspected to have tuberculosis, which differential stain would you select and
why? - CORRECT ANSWER - Acid-fast stain to visualize the microbe.
, According to the module, which mycobacterium infection will be treated free of charge by the
WHO? - CORRECT ANSWER - Leprosy
What are the three main conditions caused bye the botulism toxin? - CORRECT
ANSWER - Foodborne, infant, wound.
Why are infants more susceptible to botulism? - CORRECT ANSWER - They are still
maturing and lack of adult microbiota.
What is the mechanism of action of the toxin produced by clostridium tenani? - CORRECT
ANSWER - It causes muscle stiffness and spasms.
What Gram-negative bacterium might come into contact with in a unsanitary hot tub. -
CORRECT ANSWER - Legionella
What are the three forms of plague and what regions do they affect? - CORRECT
ANSWER - Bubonic, pneumonic, septicemic.
According to the module, which STD might be best identified via dark field microscopy? -
CORRECT ANSWER - Syphilis
The concept of treating all samples, whether known or unknown, as potentially hazardous (or
pathogenic) materials is known as __________. - CORRECT ANSWER - Universal
precautions
While observing an unknown sample of limited amounts, a researcher must determine the
following observations, 1. the presence of any motility and 2. its gram status using the same
sample. The liquid sample cannot be divided. Which would you determine first and why? -
CORRECT ANSWER - The motility should be determined first. Observing motility
requires a wet mount. Gram staining requires heat and heat kills the bacteria.
