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14 Cards in this Set

  • Front
  • Back
Chromosome
COMPOSITION
-made of DNA
-bacterial chromosome NOT enclosed with membrane

FUNCTION
-carries genetic info for cell
-gentetic info is code for all proteins cell synthesizes
-oid means resembling
Plasmid
COMPOSITION
-circular molecules of extrachromosomal DNA

FUNCTION
-do not carry codes for essential cell characteristics
-may carry code for resistance to antimicrobial drugs
-from E COLI which codes for resistance to tetracyline and ampicillin
Ribosome
COMPOSITION
-consists of ribosomal RNA
-have two subunits
-30 S and 50 S
-Total size 70 S

FUNCTION
-site of protein synthesis and translation
(EUKARYOTIC have 80 S total and 60 S + 40 S)
Cell Membrane
COMPOSITION
-No sterols found here
-has electron transport chain similar to one found in mitochondria in eukaryotic cells
(bacterial cells have no membrane bound structures and no mitochondria)

FUNCTION
-conservation of energy
Positive Cell Wall
COMPOSITION
-upper left note thick layer of peptidoglycan outside cell membrane
-lower left note dar layer of peptidoglycan in this photo of a gram positive organism taken from electron microscope
Negative Cell Wall
COMPOSITION
-components of GN cell wall
-inner cell membrane, peptidoglycan and the outer bilayer membrane composed of phospholipids and polysaccharides

FUNCTION
-gives cell osmotic protection
Cytoskeleton
v
Fimbria
COMPOSITION
-not cilia
-
Pilus
v
Flagellum
COMPOSITION
-composed of protein
-require large amounts of energy to move the bacterial cell
FUNCTION
-run and tumble
-chemotaxis
Inclusion
COMPOSITION
-some bacteria store concentrated material inside the cell like polyhydroxybutyrate

FUNCTION
-material is stored to provide a source of energy or carbon for the organism
Capsule
COMPOSITION
-may be found in pathogens

FUNCTION
-prevent phagocytosis
Slime Layer
COMPOSITION
-loosely attached to the cell
-found in biofilms

FUNCTION
-attachment
-use biofilms to attach to surfaces, such as to teeth or catheters
Spore
COMPOSITION
-single bacterium will enclose the chromosome and a few select enzymes in a thick nearly impenetrable spore coat

FUNCTION
-used for survival under adverse conditions
-bioterrorism