MICRO 290 LAB MIDTERM EXAM QUESTIONS AND ALL
ANSWERS VERIFIED
What is meant by PPE?
equipment for personal protection
What is covered under PPE?
comprises, but is not restricted to, face masks, lab coats, and chemical aprons (if
necessary).
Which safety precautions are often the most crucial when working in a
laboratory?
Avoid touching your mouth or face, disinfect your workspace with 70%
alcohol, and wash your hands often, even if you're wearing gloves.
In the video, what kind of microscope did you see?
complex binocular light microscope
What is the compound microscope's magnification power at 40X and 100X
objective lens powers?
The compound microscope's overall magnification power at 40X is 400X, and
at 100X, it is 1000X.
How many millimeters does a bacterium appear to be under the 40X objective
lens if it is 2 micrometers long? Under the oil immersion lens, how many
millimeters long does it appear to be?
Under a 40X objective lens, the bacteria measures 0.8 mm in length, whereas
under an oil immersion lens, it measures 2 mm (display work on this subject).
- 800 micro (0.8mm) = 2micro x 400
- 1000 times 2 micro = 2000 micro (2mm)
, Aureus Staphylococcus
Bacillus cereus
Spirillum volutans
Ceroviae Saccharomyces
What does the term "aseptic technique" mean?
method without contamination
What is meant by the term "immunization"?
The procedure of moving microorganisms from one medium to another
What is meant by the term inoculum?
alludes to the real bacterium.
Which instrument is most frequently used for bacterial inoculation?
circle of wires
What is meant by the term sterilizing?
clear of germs of any kind; germ-free
How do labs sterilize wire loops?
held over a flame until it is red hot, then allowed to cool for 30 to 45 seconds.
What is the isolation streak plate's primary function?
to distinguish individual bacteria from bacterial mixtures
What does the term "bacterial colony" mean?
grows on solid media surfaces. A visible mass of microorganisms that all come
from a single mother cell is called a colony.
ANSWERS VERIFIED
What is meant by PPE?
equipment for personal protection
What is covered under PPE?
comprises, but is not restricted to, face masks, lab coats, and chemical aprons (if
necessary).
Which safety precautions are often the most crucial when working in a
laboratory?
Avoid touching your mouth or face, disinfect your workspace with 70%
alcohol, and wash your hands often, even if you're wearing gloves.
In the video, what kind of microscope did you see?
complex binocular light microscope
What is the compound microscope's magnification power at 40X and 100X
objective lens powers?
The compound microscope's overall magnification power at 40X is 400X, and
at 100X, it is 1000X.
How many millimeters does a bacterium appear to be under the 40X objective
lens if it is 2 micrometers long? Under the oil immersion lens, how many
millimeters long does it appear to be?
Under a 40X objective lens, the bacteria measures 0.8 mm in length, whereas
under an oil immersion lens, it measures 2 mm (display work on this subject).
- 800 micro (0.8mm) = 2micro x 400
- 1000 times 2 micro = 2000 micro (2mm)
, Aureus Staphylococcus
Bacillus cereus
Spirillum volutans
Ceroviae Saccharomyces
What does the term "aseptic technique" mean?
method without contamination
What is meant by the term "immunization"?
The procedure of moving microorganisms from one medium to another
What is meant by the term inoculum?
alludes to the real bacterium.
Which instrument is most frequently used for bacterial inoculation?
circle of wires
What is meant by the term sterilizing?
clear of germs of any kind; germ-free
How do labs sterilize wire loops?
held over a flame until it is red hot, then allowed to cool for 30 to 45 seconds.
What is the isolation streak plate's primary function?
to distinguish individual bacteria from bacterial mixtures
What does the term "bacterial colony" mean?
grows on solid media surfaces. A visible mass of microorganisms that all come
from a single mother cell is called a colony.
