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