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9 Cards in this Set

  • Front
  • Back
What are the steps of binary fission?
1. Replication of DNA
2. Polar separation of daughter chromosomes
3. Generation of the cross-wall
4. Separation
What are the points along a bacterial growth curve?
Lag Phase
Log/Exponential Phase
Stationary Phase
Death Phase
How is bacterial concentration determined?
Determined through serial dilutions and colony forming units on agar plate. Each colony represents one bacterium from the original culture.
What are the 3 energy sources of bacteria?
1. Fermentation
2. Respiration
3. Photosynthesis
What are the 3 bacterial classifications based on nutritional requirements?
1. Heterotroph
2. Autotroph
3. Hypotroph (an intrecellular heterotroph)
What are the 5 categories of bacteria as classified by oxygen requirements?
1. Obligate aerobes
2. Obligate anaerobes
3. Facultative anaerobes
4. Microaerophilic
5. Aerotolerant anaerobes
What enzyme do aerobes have that anaerobes don't?
Aerobic bacteria have superoxide mutase that can convert the superoxide radical into oxygen and hydrogen peroxide.
What are the 3 classifications of bacteria based on temperature of optimal growth?
Psychrophiles (0-20*C)

Mesophiles (20-45*C)

Thermophiles (45-90*C)
What is the difference between differential media and selective media?
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.