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BIOD 171 Portage Learning Exam 5 Questions With Verified Answers
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©SIRJOEL EXAM SOLUTIONS 10/10/2024 11:44 AM BIOD 171 Portage Learning Exam 5 Questions With Verified Answers Define the concept of universal precautions. - answerAny samples, known or unknown are to be treated as hazardous materials. What would a researcher be certain to note while analyzing...

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  • October 15, 2024
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  • 2024/2025
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©SIRJOEL EXAM SOLUTIONS
10/10/2024 11:44 AM



BIOD 171 Portage Learning Exam 5
Questions With Verified Answers


Define the concept of universal precautions. - 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? - 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? - answer✔BAP
What disease can result if a patient with streptococcal pharyngitis goes untreated? -
answer✔Rheumatic fever.
Streptococcus, E.coli, pseudomonas, and klebsiella are all capable of causing what disease? -
answer✔All are capable of causing septicemia. Blood poisoning.

What is a facultative anaerobe? - 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? - 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? - answer✔Acid-fast stain to visualize the microbe.
According to the module, which mycobacterium infection will be treated free of charge by the
WHO? - answer✔Leprosy

What are the three main conditions caused bye the botulism toxin? - answer✔Foodborne, infant,
wound.

Why are infants more susceptible to botulism? - answer✔They are still maturing and lack of
adult microbiota.

, ©SIRJOEL EXAM SOLUTIONS
10/10/2024 11:44 AM


What is the mechanism of action of the toxin produced by clostridium tenani? - answer✔It
causes muscle stiffness and spasms.
What Gram-negative bacterium might come into contact with in a unsanitary hot tub. -
answer✔Legionella

What are the three forms of plague and what regions do they affect? - answer✔Bubonic,
pneumonic, septicemic.
According to the module, which STD might be best identified via dark field microscopy? -
answer✔Syphilis
The concept of treating all samples, whether known or unknown, as potentially hazardous (or
pathogenic) materials is known as __________. - 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? -
answer✔The motility should be determined first. Observing motility requires a wet mount. Gram
staining requires heat and heat kills the bacteria.
A facultative anaerobe is a microorganism capable of growth under what conditions? -
answer✔A facultative anaerobe can grow under with oxygen and without.
True or false: The Lancefield groups are used to subdivide antigenic groups of alpha-hemolytic
Streptococcus. - answer✔False

The distinctions for Lancefield subgroups lie in its: - answer✔Carbohydrate composition
Rheumatic fever displays______hemolytic activity and occurs _____if left untreated. -
answer✔BETA:STREP. Pharyngitis
True or false: Under most circumstances, staphylococcus can be found in 80% of human
population where it remains non-sympotomatic - answer✔False, only 30%

Define commensal bacteria - answer✔The bacterium neither harms or benefits from the host
which it obtains nutrients from

How can staphylococcus be differentially tested? - answer✔Staphylococcus species are capable
of growth in the presence of bile salts.

Symptoms of folliculitis - answer✔Pus-filled lesions on skin or hair

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