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9 Cards in this Set
- Front
- Back
What are the steps of binary fission?
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1. Replication of DNA
2. Polar separation of daughter chromosomes 3. Generation of the cross-wall 4. Separation |
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What are the points along a bacterial growth curve?
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Lag Phase
Log/Exponential Phase Stationary Phase Death Phase |
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How is bacterial concentration determined?
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Determined through serial dilutions and colony forming units on agar plate. Each colony represents one bacterium from the original culture.
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What are the 3 energy sources of bacteria?
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1. Fermentation
2. Respiration 3. Photosynthesis |
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What are the 3 bacterial classifications based on nutritional requirements?
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1. Heterotroph
2. Autotroph 3. Hypotroph (an intrecellular heterotroph) |
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What are the 5 categories of bacteria as classified by oxygen requirements?
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1. Obligate aerobes
2. Obligate anaerobes 3. Facultative anaerobes 4. Microaerophilic 5. Aerotolerant anaerobes |
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What enzyme do aerobes have that anaerobes don't?
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Aerobic bacteria have superoxide mutase that can convert the superoxide radical into oxygen and hydrogen peroxide.
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What are the 3 classifications of bacteria based on temperature of optimal growth?
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Psychrophiles (0-20*C)
Mesophiles (20-45*C) Thermophiles (45-90*C) |
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What is the difference between differential media and selective media?
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Differential media supplies nutrients and indicators for visual determination of which organisms are present. Selective media selects against the growth of particular bacteria by the addition of dyes, acids/bases, salts or antibiotics.
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