Study Set Content:
Staining of some granule’s aids in identification of what type of bacteria.
Granules
Scaffolding or skeleton within the cytoplasm, to support the wall of the bacteria
Cytoskeleton
found within the cytoplasm or attached to plasma membrane; made up of protein and rRNA.
Ribosomes
– separates the cell from its environment.
Plasma membrane
composed of two subunits
Ribosomes
cells may contain thousands.
Ribosomes
Phospholipid molecules oriented so that hydrophilic water-loving heads directed
outward
hydrophobic water-hating tails directed
inward.
Proteins embedded in two layers of lipids (lipid bilayer)
Plasma membrane
Membrane is semi-permeable
Plasma membrane
is a huge polymer of interlocking chains of alternating sugar monomers held together with peptide bridges.
Peptidoglycan
Provides rigid support while freely permeable to solutes.
Bacterial cell wall
Two main types of bacteria cell wall:
· Gram-positive
· Gram-negative
- Peptidoglycan makes up as much as 90% of the thick, compact cell wall.
Gram-positive
- More chemically complex and thinner.
Gram-negative
Peptidoglycan only(blank) of the cell wall.
5 – 20%
Peptidoglycan not outermost layer, between the plasma membrane and the outer membrane.
Bacterial cell wall
Outer membrane is similar to the plasma membrane but is less permeable and composed of lipopolysaccharides (LPS).
Bacterial cell wall
is a harmful substance classified as an endotoxin
LPS
The space between the cell wall and the plasma membrane is called
periplasm.
