Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
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 |