M5: Module 5 Exam - Requires Respondus Lock
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Attempt Time Score
Score for this quiz: 96 out of 100
Submitted Aug 11 at 11:24pm This
attempt took 36 minutes.
Question 1
pts
The concept of treating all samples, whether known or unknown, as potentially hazardous (or
pathogenic) materials is known as __________.
Your Answer:
universal precautions
Universal precautions
Your Answer:
1. any motility
2.size/shape
3. gram status (gram-positive or gram-negative)
4. presense of any chemical reactions
5. changes in color
A lab researcher would be certain to note:
1. Size and shape
2. Any observable motility
, 3. Gram status (positive or negative)
4. The presence of any chemical reactions
5. Changes in color localized to the organism or the surrounding media
6. Capture (or draw) images of any of the characteristics described above
Question 3
pts
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?
Your Answer:
You would need to determine the motility before gram status. You can observe motility on a
wet mount and then heat fix your sample to gram stain your sample. If you were to begin with
using gram staining, you would kill your sample with heat fixing, you would not be able to
observe any motility.
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.
Question 4
pts
A facultative anaerobe is a microorganism capable of growth under what conditions?
Your Answer: aerobic and anaerobic
conditions
A facultative anaerobe is capable of growth under aerobic (with oxygen) and anaerobic
(without oxygen) conditions.
/ 10
Down Browser + Webcam
Attempt Time Score
Score for this quiz: 96 out of 100
Submitted Aug 11 at 11:24pm This
attempt took 36 minutes.
Question 1
pts
The concept of treating all samples, whether known or unknown, as potentially hazardous (or
pathogenic) materials is known as __________.
Your Answer:
universal precautions
Universal precautions
Your Answer:
1. any motility
2.size/shape
3. gram status (gram-positive or gram-negative)
4. presense of any chemical reactions
5. changes in color
A lab researcher would be certain to note:
1. Size and shape
2. Any observable motility
, 3. Gram status (positive or negative)
4. The presence of any chemical reactions
5. Changes in color localized to the organism or the surrounding media
6. Capture (or draw) images of any of the characteristics described above
Question 3
pts
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?
Your Answer:
You would need to determine the motility before gram status. You can observe motility on a
wet mount and then heat fix your sample to gram stain your sample. If you were to begin with
using gram staining, you would kill your sample with heat fixing, you would not be able to
observe any motility.
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.
Question 4
pts
A facultative anaerobe is a microorganism capable of growth under what conditions?
Your Answer: aerobic and anaerobic
conditions
A facultative anaerobe is capable of growth under aerobic (with oxygen) and anaerobic
(without oxygen) conditions.
/ 10
