Organisms Exchange Substances Quiz Questions

16 Questions

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Environment Quizzes & Trivia

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Questions and Answers
  • 1. 
    An organic nutrient essential to an organism's metabolism that cannot be synthesized itself is termed a
    • A. 

      Trace element

    • B. 

      Micronutrient

    • C. 

      Growth factor

    • D. 

      Mineral

  • 2. 
    The source of the necessary elements of life is
    • A. 

      An inorganic environmental reservoir

    • B. 

      The sun

    • C. 

      Rocks

    • D. 

      The air

  • 3. 
    An organism that can synthesize all its required organic components from CO2‚Äč using energy from the sun is a
    • A. 

      Photoautotroph

    • B. 

      Photoheterotroph

    • C. 

      Chemoautotroph

    • D. 

      Chemoheterotroph

  • 4. 
    An obligate halophile requires high
    • A. 

      PH

    • B. 

      Temperature

    • C. 

      Salt

    • D. 

      Pressure

  • 5. 
    Chemoautotrophs can survive on _______ alone.
    • A. 

      Minerals

    • B. 

      CO2

    • C. 

      Minerals and CO2

    • D. 

      Methane

  • 6. 
    • A. 

      Organic nutrients

    • B. 

      Inorganic nutrients

    • C. 

      Growth factors

    • D. 

      Oxygen gas

  • 7. 
    A pathogen would most accurately be described as a
    • A. 

      Parasite

    • B. 

      Commensal

    • C. 

      Saprobe

    • D. 

      Symbiont

  • 8. 
    • A. 

      It requires a gradient

    • B. 

      It uses the cell wall

    • C. 

      It includes endocytosis

    • D. 

      It only moves water

  • 9. 
    A cell exposed to a hypertonic environment will ________ by osmosis.
    • A. 

      Gain water

    • B. 

      Lose water

    • C. 

      Neither gain nor lose water

    • D. 

      Burst

  • 10. 
    Active transport of a substance across a membrane requires
    • A. 

      A gradient

    • B. 

      The expenditure of ATP

    • C. 

      Water

    • D. 

      Diffusion

  • 11. 
    Psychrophiles would be expected to grow
    • A. 

      In hot springs

    • B. 

      On the human body

    • C. 

      At refrigeration temperatures

    • D. 

      At low pH

  • 12. 
    • A. 

      Accumulation of inducer molecules

    • B. 

      A certain level of biofilm density

    • C. 

      Self-monitoring

    • D. 

      Release of genetic material

  • 13. 
    Superoxide ion is toxic to strict anaerobes because they lack
    • A. 

      Catalase

    • B. 

      Peroxidase

    • C. 

      Dismutase

    • D. 

      Oxidase

  • 14. 
    The time required for a cell to undergo binary fission is called the
    • A. 

      Exponential growth rate

    • B. 

      Growth curve

    • C. 

      Generation time

    • D. 

      Lag period

  • 15. 
    In a viable plate count, each ______ represents a ______ from the sample population.
    • A. 

      Cell, colony

    • B. 

      Colony, cell

    • C. 

      Log phase

    • D. 

      Enlargement phase

  • 16. 
    The stage in population growth with the highest rate of cell division is the
    • A. 

      Stationary phase

    • B. 

      Lag phase

    • C. 

      Log phase

    • D. 

      Enlargement phase