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38 Cards in this Set

  • Front
  • Back
Microbiology Studies
prions, viruses, bacteria, fungi, and parasites
biotechnology
uses microbes to solve biological problems
(antibiotics, degrade toxic wastes)
Leeuwenhook
1st to observe microbe
1st to make microscope
Jenner
small pox vaccine by using cow pox
Semmelweis
handwashing (OB)
Lister
antiseptic surgery and wound care; used phenol as disinfectent
Pasteur
anthrax and rabies vax; disproved spontaneous generation with swan flasks to prevent microbes contaminating sterile liquid
Koch
postulates to i.d. organism causing disease & germ theory
Koch's Postulates
1. Organism exists in aminals infected with specific disease
2. Pure Culture of organism
3. Produce same s/s seen in infected into the uninfected animals with the isolate
4. Isolate the identical microbes from the newly infected animal
Pure culture
as each cell divides, it forms a clump of cells that all grew from one organism and appeared identical
Germ Theory
microbes will grow in humans and cause disease that spread from person to person
Fleming
created Penicillin (kills bacteria) and identified the enzyme Lysozyme to degrade bacteria cell walls
7 taxonomy
Kingdom
Phylum
Class
Order
Family
Genus
Species
Binomial system to id/name microbes
genus and species
2 domains of bacteria
archae and bacteria
Differential stain
differentiates two common bacteria (gram pos and neg)
Crystal Violet
gram +
Safranin (red/pink)
gram -
Dark field microscope
light reflected off bacteria seen; light going thru specimen blocked out
electron microscopes
0.003 microns
uses metal and shines electrons better than light

2 types
transmission
scanning - visualize surfaces
medium
nutrtious extract/mixture of materials that will support growth of microbes
medical medium
BHI brains/heart infusion (powder than add water)
solid medium
agar, polysaccharide disolved by boiling pour into petri then cool to solid
water is polar
it has + charges at one end and - charges at the other
Low pH
Acid <6 H+
High ph
Basic >8 OH-
Neurtral pH
7
Acid ions
H+
Basic ions
OH -
The 4 macromolecules
1. protein (enzymes)
2. polysccharides
3. Nucleic Acid
4. Lipids
Proteins (enzymes)
enzymes cause break down of nutrients to derive enrgy

proteins transporters/structure (flaggella)
Polysaccharides
provide strength to keep cell from opening (cell wall/capsules) assembled by enzymes
Nucleic Acid
sugar phosphate DNA double strands RNA single strands
DNA components
A and T (adenine and thymidine)
C and G (cytosine and guanine)
RNA components
A and U (adenine and uridine)
C and G (cytosine and guanine)
What is the different component from DNA to RNA and what does it replace
uridine (in RNA) replaces thymidine (in DNA)
3 RNA =
one amino acid
Lipids
(phospholipids) span cell membrane; nonbolar boundary to keep cell contents in and unwanted material out
polars face water
tails in middle