1.What type of inclusions are easy to spot by negative staining?
A) Protein inclusions
B) Carbohydrate inclusions
C)
Refractile cytoplasmic inclusions
D) Nucleic acid inclusions
C) Refractile cytoplasmic inclusions
1.What is the main advantage of using negative staining?
A) It
stains the cell wall
B) It is a quick procedure
C) It
requires heating the specimen
D) It uses basic dyes
B) It is a quick procedure
1.What can negative staining be used to demonstrate?
A)
Intracellular structures
B) Extracellular structures
C)
Genetic material
D) Cell division
B) Extracellular structures
1.What type of layer do many bacteria secrete outside of their cell
wall?
A) Protein layer
B) Lipid layer
C) Mucoid
layer of polysaccharide or polypeptide
D) Nucleic acid layer
C) Mucoid layer of polysaccharide or polypeptide
1.How do encapsulated bacteria usually appear in colony morphology?
A) Dry and rough
B) Gooey, slimy, smooth, and shiny
C) Flat and dull
D) Irregular and fuzzy
B) Gooey, slimy, smooth, and shiny
1.How can the presence of capsules be confirmed?
A) By using
Gram staining
B) By using capsule stains or negative staining
C) By using simple staining
D) By using endospore staining
B) By using capsule stains or negative staining
1.What appearance does the capsule have when smears of encapsulated
cells are prepared with Congo red?
A) Colored halo surrounding
the cell
B) Clear halo surrounding the cell
C) Dark spot
within the cell
D) No visible change
B) Clear halo surrounding the cell
1.Why are some bacteria difficult to see without special staining
techniques?
A) They are too large
B) They have a thick
cell wall
C) They secrete extracellular polymers
D) They
are highly motile
C) They secrete extracellular polymers