PROKARYOTIC ULTRASTRUCTURE Flashcards
MESOSOME
membrane bound
invagination in the CM found in the equator of the cell
something to do with cell div, replication, segregation
MAGNETOSOME
membrane bound
stores magnetic crystals (serve as an internal compass of prokaryotic direct path)
CHROMATOPHORE
membrane bound
invaginations in CM that appear as ribbon like
stores bacteriophyll for photosynthesis
CELL WALL
made up of peptidoglycan
N-acetylglucosamine
n-acetylmuramic acid
CAPSULE
slimy (prevents from being engulfed)
rich in polysaccharide
rinch in moisture (avoid dehydration)
PILI
projection in cell membrane for locomotion
against phagocytes
2types
common pili - attachment
sex pili - conjugation and pathway of DNA
FLAGELLA
locomotion
source of energy : PMF
GRAM -
thin peptidoglycan
has periplasmic space
amide linkage
GRAM +
has thick peptidoglycan
pentaglycine linkage
no periplasmic space
NUCLEAR ZONE
has genetic material
PLASMIDS
snaller than main chromosomes
used as vectors for dna recombination
stores genes for
antibiotic resistance
tolerance to toxic metals
certain enzymes for toxin synthesis
RIBOSOMES
protein synthesis
STORAGE GRANULES
inclusion bodies
reserve deposits
PROKARYOTIC CYTOSKELETON
actin (ParM, MreB)
microtubules (FtsZ, BtuB, BtuA)
intermediate filament (Cres*)
cell division
establish polarite
support
