chap 2, Cell exterior Flashcards
cell exterior of prokaryotic cells
all eukaryotic cells have
cytoplasm, ribosomes, plasma membranes, nuclei containing DNA
cell envelopes
surrounds cytoplasm of prokaryotes
made of cell membrane, cell wall, appendages attach here
monomorphic
single shape- most bacteria
pleomorphic
many shapes/forms
spiral shapes
vibrio (one bend), spirillum (twisty, usually have flagella, ridgid), spirochete (corkscrew)
Nucleoid
prokaryote location of chromosome
pairs prefix (2)
dip
cluster
Staphylo
chains
Strepto
tetrads
four, cube like
sarcine
groups of 8
bacillus
rod
coccus
spherical
morphology effects
nutrient intake, motility (swimming and gliding)
resolution
ability of a lens to distinguish between two points
refractive index
light bending ability of medium/ microbe
light microscopy
white light (0.2 microns), stains,
TEM
electron microscopy, sections, 0.01 nm resolution (high), shows internal structures
SEM
electron microscopy, 10nm resolution, shows surfaces
scanning probe microscopy
can see atoms, surface? yea idk
cryo-EM
sample is flash frozen and prepared
cell membrane is a - and consist of
selective permeable barrier, consist of: phospholipid bilayer, proteins, some have sterol