PRACTICAL TEST Flashcards
microscopic unicellular prokaryotes
cell structure simpler (no nucleu and no membran-bounded organelles)
can be classified into shape arrangement aand gram stain reaction
bacteria
shapes of bacteria (4)
spherical (cocci)
rods (bacilli)
comma (vibrio)
corkscrew (spirochaetes)
spherical bacteria
cocci
rod bacteria
bacilli
comma bacteria
vibrio
corkscrew bacteria
spirochaetes
arrnagements of bacteria (4)
diplococci (pairs)
streptococcus (chains)
staphylococci (clusters)
tetrads (sarcina)
pairs bacteria
diplococci
chains bacteria
streptococci
clusters bacteria
staphylococcus
tetrads bacteria
sarcina
to determine if gram + or -, bacteria uses __
gram staining
counter stain
safranin
can be decolourized to accept counter stain
gram -
retain crystal violet dye and stain dark violet or purple
gram +
thin peptidoglycan layer (single)
gram -
think peptidoglycan layer (multilayer)
gram +
absent teichnoic acid
gram -
present teichoic acid
gram +
periplasmic space present
gram -