2/22/22, 3:46 PMM5: Module 5 Exam- Requires Respondus LockDown Browser: Essential Microbiology with Lab- Kephart https://nursingabc.instructure.com/courses/135/quizzes/5936?module_item_id=419461/10
M5: Module 5 Exam- Requires Respondus LockDown Browser
DueNo due datePoints100Questions29Time Limit60 Minutes Requires Respondus LockDown Browser This quiz is currently locked.Attempt History AttemptTimeScore LATESTAttempt 153 minutes83 out of 100
Score for this quiz:83 out of 100
Submitted Mar 14, 2021 at 4:35pm
This attempt took 53 minutes.3/ 3 pts Question 1
Your Answer:
Define the concept of universal precautions.Any and all samples, known or unknown, that are to be treated as potentially hazardous materials Universal precautions means any and all samples, whether known or unknown, are to be treated as potentially hazardous (or pathogenic) materials.3/ 3 pts Question 2
Your Answer:
List at least 3 observations a researcher would be sure to note while assessing an unknown microbial sample.While assessing an unknown microbial sample, a reasearcher should note the size and shape, observable motility and the presence of any chemical reactions along with gram status.
A lab researcher would be certain to note:
- Size and shape
- Any observable motility
- Gram status (positive or negative)
- The presence of any chemical reactions
- Changes in color localized to the organism or the surrounding media
- Capture (or draw) images of any of the characteristics described above
5/ 10 pts Question 3 1 / 2
2/22/22, 3:46 PMM5: Module 5 Exam- Requires Respondus LockDown Browser: Essential Microbiology with Lab- Kephart https://nursingabc.instructure.com/courses/135/quizzes/5936?module_item_id=419462/10
Your Answer:
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?First, I would determine the motility because by properly documenting observations, it helps to identify causative agents and selecting appropriate treatments against foreign microbes. You must determine motility before determining the Gram status. Motility requires a wet mount, while Gram staining requires heat fixing the sample. If one were to begin with the Gram stain the heat fixation process would kill the organism, making any observations regarding motility impossible. The correct approach would be to place the liquid culture on a glass slide and determine its motility status. Next, the same liquid culture can be heat fixed and Gram stained.3/ 3 pts Question 4
Your Answer:
A facultative anaerobe is a microorganism capable of growth under what conditions?It is capable of growth in both the presence or absence of oxygen. A facultative anaerobe is capable of growth under aerobic (with oxygen) and anaerobic (without oxygen) conditions. 10/ 10 pts Question 5
Your Answer:
As Streptococcus is catalase negative would it thrive or die in the presence of peroxides? Why?It dies in the presence of peroxides because it cannot break down peroxides and needs to be cultured on
BAP.
Streptococcus would not survive in the presence of peroxides—it is unable to breakdown peroxides (catalase negative). Left unchecked, peroxides would damage the cellular integrity of Strep causing lysis/cell death.2/ 2 pts Question 6
Streptococcus is most often streaked onto:
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