WGU C453 Clinical
Microbiology / Expert Verified Actual
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Newest Update, 2025-2026.
Practice questions for this set
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Cell wall is thinner, but more complex. Only 10-20% peptidoglycan. Contains
an outer membrane, leaving a very narrow periplasmic space. Does not retain
crystal violet stain because of large quantities of lipoproteins and
lipopolysaccharides (endotoxin).
Give this one a try later!
1 Griseofulvin 2 Zygomycota
3 Vibrio Gram-negative Bacteria
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, Terms in this set (139)
Bacteria Single-celled organism that do not have a cell nucleus and
the membrane-enclosed intracellular structures found in
most other cells (Prokaryotic cell).
Gram-positive Bacteria Thick layer of peptidoglycan (20-80nm across). The
peptidoglycan layer is closely attached to the outer surface of
the cell membrane. Retains crystal violet stains. Lack an outer
membrane and a periplasmic space.
Gram-negative Bacteria Cell wall is thinner, but more complex. Only 10-20%
peptidoglycan. Contains an outer membrane, leaving a
very narrow periplasmic space. Does not retain crystal
violet stain because of large quantities of lipoproteins and
lipopolysaccharides (endotoxin).
Acid-fast Bacteria Cell wall is thick, but consists of 60% lipids. Lipids make acid-
fast organisms impermeable to most other stains and
protect them from acids and alkalis. Stain as gram-positive.
Grow slowly because the lipids impeded entry of nutrients.
Endotoxin Lipopolysaccharide (LPS). Part of the outer membrane of
the cell wall of gram-negative bacteria. It can cause fever
and dilates blood vessels- causing BP to drop. Bacteria
typically release this when they are dying, so killing them
increases the concentration of this toxic substance.
Antibiotics given late in the infection can cause worsening of
symptoms or even death.
Wall-deficient Bacteria Protected by a strengthened cell membrane that
contains sterols. Example: mycobacterium
paratuberculosis with Crohn's disease- a chronic
disorder of the intestine.
Coccus Sphere shaped bacteria
Microbiology / Expert Verified Actual
Questions & Answers for Guaranteed Pass |
Newest Update, 2025-2026.
Practice questions for this set
Learn / Study with Learn
Cell wall is thinner, but more complex. Only 10-20% peptidoglycan. Contains
an outer membrane, leaving a very narrow periplasmic space. Does not retain
crystal violet stain because of large quantities of lipoproteins and
lipopolysaccharides (endotoxin).
Give this one a try later!
1 Griseofulvin 2 Zygomycota
3 Vibrio Gram-negative Bacteria
Don't know?
, Terms in this set (139)
Bacteria Single-celled organism that do not have a cell nucleus and
the membrane-enclosed intracellular structures found in
most other cells (Prokaryotic cell).
Gram-positive Bacteria Thick layer of peptidoglycan (20-80nm across). The
peptidoglycan layer is closely attached to the outer surface of
the cell membrane. Retains crystal violet stains. Lack an outer
membrane and a periplasmic space.
Gram-negative Bacteria Cell wall is thinner, but more complex. Only 10-20%
peptidoglycan. Contains an outer membrane, leaving a
very narrow periplasmic space. Does not retain crystal
violet stain because of large quantities of lipoproteins and
lipopolysaccharides (endotoxin).
Acid-fast Bacteria Cell wall is thick, but consists of 60% lipids. Lipids make acid-
fast organisms impermeable to most other stains and
protect them from acids and alkalis. Stain as gram-positive.
Grow slowly because the lipids impeded entry of nutrients.
Endotoxin Lipopolysaccharide (LPS). Part of the outer membrane of
the cell wall of gram-negative bacteria. It can cause fever
and dilates blood vessels- causing BP to drop. Bacteria
typically release this when they are dying, so killing them
increases the concentration of this toxic substance.
Antibiotics given late in the infection can cause worsening of
symptoms or even death.
Wall-deficient Bacteria Protected by a strengthened cell membrane that
contains sterols. Example: mycobacterium
paratuberculosis with Crohn's disease- a chronic
disorder of the intestine.
Coccus Sphere shaped bacteria
