Primer Flashcards
Mobile genetic elements. Jumping genes
Transposons
Dna replication followed by insertion of new copy into another site
Replicative transposition
Dna is excised from the site without replicaitng and the inserted in new site
Direct transposition
Vacuolated neurons with loss of fxn and lack of an immune response or inflammation
Spongiform encephalopathies
No human disease
Viroids
Human prion disease. Dementia and death
Creutzfeldt-jakod disease
Prion disease. Loss of muscle control, shivering, myoclonic jerks, loss of coordiation
Kuru
Treatment for prion
None
Cessation of cannanalism
Disinfection of neurotools and electrodes with 5% hypochlorite or dosium dioxide
Elimination of animal products from livestock
Smallest bacteria
Mycoplasma
Largest medically important bacteira
Borrelia burgdorferi
Largest bacteria
Thiomargarita namibiensis
All mycobacteria have cell wall composed of pepticoglycan except
Mycoplasma-sterol
Kill bacteria by cleaving the gkycan backbone
Lysozymes
Exclusive to gram-positive
Teichiic acid
Unique to gram neg
Endotoxins/LPS
outer membrane
All gram-positive bacteria have no endotoxin EXCEPT
Listeria monicytogenous-
Endotoxin shock
In gram staining, lipid is washed away by
Decolorizing agent: acetone
Bacteria not seen in gram staining
Mycobacteriae Spirochetes Mycoplasma Legionella Chlamydia Rickettsiae
Legionella
Silverstain
Chlamydia
Giemsa stain
Inclusion bodies
Rickettsiae
Giemsa stain
Spirochetes
Darkfield microscopy
Mycobacteriae
Acid fast stain
All bacterial capsules are composed of polysaccharide except
Bacillus anthracis-protein
Spores
Bacillus
Clostirium
Capable of cleaning up environmental hazards such as oil spills and toxic chemical wastes
Biomediation
Genes for antibiotic resistance and toxins
Plasmids
Cells are depleted, nutrients are incorporated, zero griwth rate. What phase of bacterial growth
Lag phase
Log phase-constant growth
Maximum stationary phase- exhaustion of nutients, zero griwth rate
Oxygen metabolic generates toxic products such as
Superoxide and hydrogen peroxide
Needed to survive in aerobic environments
Superoxide dismutase, peroxidase, catalase
Obligate aerobes
Dependent on oxygen
Use fermentation but can tolerate low amounts of oxygen
Microaerophiles