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46 Cards in this Set

  • Front
  • Back
transformation
uptake of DNA by competent cell
Acinetobacter spp. ADP-1
wild-type, can grow on POB
POB
p- hydroxyhenzoate
Acinetobacter spp. ADP-6
mutant, lacks enzyme protocatechuate oxygenase
TENS solution
Tris buffer- pH buffer suppress DNA
EDTA- chelating agent, removes cations
NaOH- breaks cell wall
SDS- detergent to solubilize cell membrane
pilius
cell-cell contact
plasmid
closed-circular, extrachromosomal DNA capable of self-replication
TOL plasmid
conjugable plasmid > breakdown of M-Toluate
What are the two ways of DNA transfer?
Chromosomal and plasmid transfer
Pseudomonas putida PAW-15
donor strain, leucine auxotroph> leu-, tol +
Pseudomonas putida 503CA
receptor strain, prototroph> Leu +, Tol -
M-tol
none should grow
M-tol+ Leucine
PAW-15
GMM
503CA
coliphages
sewage filtrate
viruses
noncellular, obligate intracellular parasites
bacteria
intracellular, plasma membrane, ATP metabolism, ribosomes, senistive to antibotics
growing phages
visualization of infection using solid media zone of clearing
bateriophage titer
plaque-forming units
algae
eukaryotic photoautotrophs, little tissue differentation, no vascular system
phycology
study of algae
importantance of algae
agar, food thickener, cosmetics, petroleum
green algae
terrestrial plants precursor Chlamydomonas (flagellate) Volvox (colonial) Spirogyra (filamentous) Desminds
brown algae
kelp, seaweed, rapid growth, use as thickener, tires
red algae
mostly marine, agar source
diatoms
complex cell walls "diatomaceous earth" - silica cell walls
dinoflagellates
plankton, red tides, neurotoxin
cyanobacteria
oxygenic photosynthetic (in thylakoids),blue green bacteria, aquatic, some fix nitrogen in heterocysts, morphology: unicellular, colonial, filamentous
protozoa
unicellular eukaryote, non-photosynethetic, chemohetertrophs ( except euglenoids that can be photoautotrophs) covered by unit membrane (pellicle)
What are the two stages of protozoa?
cysts- survival unfavorable conditions
trophozoites- feeding, reproduction
importance of protozoa
-important in recycling
-natural insecticides
-symbiotic association with animals (digestion in cow's rumen)
-cause human diseases
Chagas disease, Entamoeba histolytica
Plasomodium spp.(protozoa)
causes moust devasting form of malaria
naturally competent cells
Bacillius, S.pneumoniae, Acinetobacter spp.
artifically competent cells
E.coli very important in biotechnology
discovery of transformation
Griffith 1928
Protocatechuate oxygenase
required enzyme to breakdown POB
GMM
glucose minimal medium control growth
conjugation
unidirectional transfer of genetic material
horizontal DNA transfer
DNA transfer with similar species
GMM grows?
503CA, E. coli, no PAW-15
M-tol + leucine grows?
PAW- 15 (req leucine), 503CA & E. coli cannot break down m-tol
M-toluate grows?
none grow
M-toluate test plate grows
PAW-15 transferred conjugated plasmid to 503CA
viruses
noncellular, obligate intracellular parasites DNA or RNA (capsid)
host range
receptors: Bacteriophages- phages, Coliphages- E.coli
bacteriophage infection pathways
lysis- death of host cell
lysogeny- prophage