Microbial Nutrition and Ecology
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Questions and Answers

What is the primary source of nitrogen for heterotrophs?

  • Phosphoric acid (H₃PO₄)
  • Nitrogen gas (N2) in the atmosphere
  • Sulfur-containing amino acids
  • Proteins, DNA, RNA, and ATP (correct)
  • Which of the following elements is essential for energy transfers in cells?

  • Oxygen
  • Phosphorus (correct)
  • Hydrogen
  • Sulfur
  • What is the term for the transport of molecules against a gradient, requiring energy and carrier proteins?

  • Passive transport
  • Active transport (correct)
  • Facilitated diffusion
  • Osmosis
  • Which of the following organisms derives its energy from sunlight and produces oxygen as a byproduct?

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

    What is the term for the process by which substances are taken into a cell without being transported through the membrane, requiring energy?

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

    What is the primary function of micronutrients in microbial nutrition?

    <p>Maintain protein structure and enzyme function</p> Signup and view all the answers

    Which type of nutrient is composed of carbon and hydrogen atoms?

    <p>Organic nutrients</p> Signup and view all the answers

    What percentage of a microbial cell is composed of six elements?

    <p>96%</p> Signup and view all the answers

    What is the primary characteristic of heterotrophs?

    <p>They obtain carbon in an organic form</p> Signup and view all the answers

    What type of autotroph derives energy from organic compounds and obtains its carbon source from inorganic compounds?

    <p>Chemoorganic autotroph</p> Signup and view all the answers

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