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How does the survival and growth of any microorganism in a given environment depend on its metabolic characteristics?

Topic

Metabolism

Framing Question

How does the survival and growth of any microorganism in a given environment depend on its metabolic characteristics?

Learning Objectives

  • Define cardinal temperature, maximum temperature, and minimum temperature for an organism.
  • Define thermophilic, psychrophilic, psychrotolerant, mesophilic, halophilic, acidophilic, alkalophilic, etc., organisms.
  • Explain the concept of diauxic growth.
  • Describe how very high (or low) temperatures, pH, or salt concentration inhibit growth (e.g., membrane stability, enzyme activity, proton motive force, etc.).
  • Name the four phases of prokaryotic growth, and describe what the cells are doing during each phase.
  • Describe how oxygen affects the growth of aerobes, obligate anaerobes, and facultative anaerobes.
  • Given the starting concentration of a culture and the number of generations that occur, calculate the final concentration of the culture.
  • Explain in general terms what a chemostat is and for what it is used.

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