Bio 2010 - Microbiology » Summer 2023 » Lab Quiz 2
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Question #1
Acid-fast cells resist the acid destain due to the presence of __________ in their cell envelope.
A.
phospholipids
B.
peptidoglycan
C.
lipopolysaccharides
D.
mycolic acids
Question #2
__________ is the primary stain used in the endospore stain.
A.
safranin
B.
crystal violet
C.
malachite green
D.
carbolfushin
Question #3
Following the endospore stain, vegetative (living cells) stain
A.
blue
B.
purple
C.
pink or red
D.
green
Question #4
Place the steps of the Gram stain in the correct order: 1. 95% acetone alcohol 2. crystal violet 3. safranin 4. iodine
A.
2-4-1-3
B.
1-2-3-4
C.
4-3-2-1
D.
1-3-2-4
E.
2-1-4-3
Question #5
The primary stain used in the Gram stain is
A.
crystal violet
B.
iodine
C.
safranin
D.
acetone-alcohol
Question #6
The secondary stain used in the acid-fast stain
A.
safranin
B.
carbolfushin
C.
methylene blue
D.
crystal violet
Question #7
Which of the following does not use a destain (decolorizing) agent?
A.
endospore stain
B.
acid-fast stain
C.
Gram stain
Question #8
Which of these bacterial genera are endospore-formers? 1. Clostridium 2. Staphylococcus 3. Mycobacterium 4. Bacillus
A.
1 and 4
B.
1 and 2
C.
3 and 4
D.
2 and 3
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