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26 Cards in this Set

  • Front
  • Back
outer membrane gram neg bacteria
inner membrane, peptidoglycan wall and lipopolysaccharide layer
lipopolysaccharide layer
(permeable outer membrane)
2.lipoplysaccharide (LPS)
3.outer integral proteins
4.small lipoprotein anchors to peptidoglycan layer
gram positive bacteria
peptidoglycan layer/cell wall
cell membrane
integral protein
teichoic and lipoteichoic acids
LPS of gram neg bacteria
an "O" Ag, varies w/i species
core polysaccharide
endotoxin, toxic to animals
lipid A
n-acetyl glucoseamine
has ester amines,FA, and GlcN
transmembrane proteins that are hydrophilic and make the outer mem of gram neg bacteria very permeable
porins constituents
3 identical polypeptides and 4 pores, one formed by each protein and one in the center
porin structure
rhodobacter blasticus
shaped like hot pretzel
periplasm (gram neg bacteria) bw inner and outer mem
2.gel-like made of proteins
3.hydrolytic enzyme (food processing), binding (transport), chemoreceptors
cell surface structures of prokaryotes
paracrystalline layers (S)
capsules and slime(gycocalyx)

short bristle-like made of protein,shorter than flagella

classified into types (1-7)
functions of pili
cell adhesion
TYPE I: pathogenicity facotrs, host colonization factors(pathogen)
slimy masses of bacteria adhering by way of fimbriae or pili. 99% of prok exist in biofilms
type 4 pili
twitching, extension is followed by adhesion.
involved in uptake of DNA by cells during transformation.
sex pili
type VII: long hollow tubules
length bw pili and flagella
1 or 2 per cell
mating-pair formation
targets of attachment for viruses
surface layers (S layers)
in every bacteria
the cell wall in archaea
filters macromolecules/virus
adhesion of host to cell
hold extracellular enzymes to degrade
protection against host-defense mechanisms
organized repeating organic compounds
attached firm to cell surface
protect cells from drying out
(ie:bacillus anthracis)
more ie's of capsules
acinetobacter stained w/ ink
streptococcus pneumoniae
slime layers
consist of polysacc attached loose to cell surface
water soluable
protect cells from drying out
sticky layer allows attachment and bioform formation (gliding)
cell inclusions
within prok and euk cells
function of reservoirs of energy reserves (carbon)
contents surrounded by lipid membrane
located in periplasmic gram -
carbon storage granules
C stored as lipids or polysac
lipids:C4-C18 (ester bonds)
polysac:glycogen in prok
PHB inclusion bodies
it is ubiquitous
phosphate and sulfur storage
phos stored as polyphosphate
sulfur oxidizes H2S, get S(o) stored in periplasm
sulfur ie: isoichromatium buderi
~50 magnetite crystals in lipid bilayer mem
1.occur in chains
2.compass needle, allows cells to self-orient towards mag-field
magnetosomes cell structure
(MG), no staining, it kills the cells
inner mem, peptoglycan,ribos
chemoreceptor, outer mem
growth of magnetosomes
fully grown is dark black
flanked by cytoskeletal filaments-