Microbial Growth Overview
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Questions and Answers

What are the physical requirements for microbial growth?

  • Temperature and osmotic pressure
  • Temperature and pH (correct)
  • pH and osmotic pressure
  • pH and water availability
  • At what temperature do thermophiles, specifically hyperthermophiles, have their optimum growth?

  • 50-60⁰C
  • 121⁰C and above
  • 80°C or higher (correct)
  • 25–40°C
  • In what pH range do most bacteria grow best?

  • Above pH 8
  • Below pH 4
  • Between pH 4 and 5
  • Between pH 6.5 and 7.5 (correct)
  • Which type of microbes are cold-loving microbes?

    <p>Psychrophiles</p> Signup and view all the answers

    What is the term for the shrinkage of cell cytoplasm due to a hypertonic environment?

    <p>Plasmolysis</p> Signup and view all the answers

    Which microorganisms can grow in or tolerate saline conditions?

    <p>Extreme Halophiles</p> Signup and view all the answers

    What type of microbes are unable to use molecular oxygen for energy-yielding reactions?

    <p>Obligate anaerobes</p> Signup and view all the answers

    What is the process by which one cell eventually separates to form two cells?

    <p>Binary fission</p> Signup and view all the answers

    Which element is not listed as a chemical requirement for microbes?

    <p>Oxygen</p> Signup and view all the answers

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