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Worksheets11.1 Morphological Characterization of Bacteria - MicroCore RC
Total questions: 10
Worksheet time: 5mins
Which of the following is a gelatinous polymer of polysaccharides that forms either as a capsule or slime layer?
exopolysaccharide
metachromatic granules
glycolipid
glycocalyx
Which of the following is not found in Gram-positive bacteria?
N-acetylglucosamine
Lipid A
Murein
Teichoic acid
Cell membrane
Which term describes a bacterial species that alter its shape in response to varying environmental conditions?
Amorphous
Unusual
Pleiomorphic
Stalked
Which of the following staining methods is NOT used to observe bacterial capsules?
Gregersen's Method
Anthony's method
Maneval's staining method
Negative staining
Which of the following structures are pentacyclic triterpenoids structurally similar to cholesterol but found in bacterial membranes?
Teichoic acids
Integral proteins
Holdfast
Hopanoids
What happens when you treat Bacillus megaterium with lysozyme?
It will not be killed since being a Gram positive bacteria, it has a thick peptidoglycan layer.
It will be killed because it blocks the activity of the transpeptidase thereby interrupting the cross-linking & CW synthesis.
It will be killed because it hydrolyses the β-1, 4 bond connecting NAM & NAG residues.
It will not be killed because it has mycolic acids similar to that of Mycobacterium tuberculosis.
Which of the following is not a function of the bacterial capsule?
For resisting phagocytosis
Attachment
Energy reserve
Excludes bacteriophages
None of the choices
What is this structure that is defined as an amorphous material, a polysaccharide-based adhesin, that is attached at one pole of the cell?
Sheath
Flagella
Holdfast
Capsule
Hopanoid
Which of the following is NOT true about the cell membrane?
The lipid bilayer component is hydrophobic.
It contains both lipids and proteins.
Majority of the cell membrane is made up of proteins.
It is semi-permeable.
What happens when you Gram stain a Mycoplasma?
The cells are colored blue/violet.
The cells are colored pink/red.
You cannot stain them since they have no cell wall.
The cells remain colorless.
