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30 Cards in this Set
- Front
- Back
MPN
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Most Probable Number: A way of measuring bacterial growth.
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Phisiological saline
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0.85
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At specific gravity and 4 degrees C, what is the density of water?
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1.00
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What is density measured in?
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g/cm^3
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What factors influence bacterial cell growth?
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Nutrients, Temperature, pH, Water availability, Light, Oxygen, Heavy Metals, Antibiotics.
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What produces T-T dimers?
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UV light
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How fast does E.coli in the human gut replicate?
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Every 20 minutes.
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How big is one cell of E.coli?
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1 micrometer
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What are three major cell components?
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ATP
Total Protein Nitrogen (147%) |
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Which bacteria observed in the lab contain capsules?
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Bacillus and E.coli
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Who is the father of microbiology?
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Antony van Leeuwenhoek
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Who is the father of moderm microbiology?
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Louis Pasteur
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Who named endospores?
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Ferdinand Cohn
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Who studied/discovered endospores?
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John Tyndall and Ferdinand Cohn
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What is an infusion?
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The broth/media being used in an experiment.
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Galen (150 AD)
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~ Imbalance between 4 humours caused diseases
~ Blood, phlegm, yellow bile, and black bile ~ This is also why leaches were considered as healing techniques. |
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Girolamo Fracastoro (1546)
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~ Invisible organisms ("germs") caused disease.
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Agostino Bassi (1835)
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~ silkworm disease caused by fungus.
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M.J. Berkeley (1845)
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~ Potato blight in Ireland (1845) caused by fungus.
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Heinrich de Bary (1853)
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~ smuts and rusts caused cereal crop disease.
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Louis Pasteur (1857)
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~ Pebrine disease of silkworms caused by microsporan (Nosema bombysis)
~ Revised "Germ theory" of diseases |
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What was the approximate magnification of van Leeuwenhoek's lenses?
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300X
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In 1674 when van Leeuwenhoek first observed microorganisms with his crude microscope, what did he call the things he saw?
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Animalcules
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Robert Koch
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Anthrax caused by (Bacillus anthracis) and transmitted by resistant spores.
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Probiotics
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The use of bacteria in products that also help prevent disease.
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PCB
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Polychlorinated biphenyls
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DDT
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Dichlorodiphenyltrichloroethane
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What process do bacteria use to replicate/reproduce?
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Binary Fission
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What is a mordant?
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A mordant is a substance that helps a staining substance bond to a bacterial cell. (Gram's Iodine)
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What are the four steps of Gram Staining?
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1. Primary Stain
2. Mordant 3. Decolorizer 4. Counterstain |