Electron Transport Chain in Cellular Respiration
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Electron Transport Chain in Cellular Respiration

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Questions and Answers

Why is anaerobic respiration mostly relegated to oxygen-free environments?

  • Anaerobes prefer oxygen as an electron acceptor.
  • Anaerobic respiration releases more energy in the presence of oxygen.
  • Oxygen is poisonous to many anaerobes. (correct)
  • Anaerobes are highly resistant to oxygen.

    • What governs the selection of TEAs in anaerobic respiration?

  • Light intensity
  • Atmospheric pressure
  • Temperature
  • Free energy yields (correct)

    • Which of the following is NOT a commonly available TEA in anaerobic environments?

  • Nitrate
  • Carbon dioxide (correct)
  • Oxygen
  • Ferric iron (Fe(III))

    • What does PED stand for in the context of respiration?

    <p>Primary Electron Donor</p> Signup and view all the answers

    What mainly determines the use of a particular PED in respiration?

    <p>Free energy yields associated with its reaction with TEAs</p> Signup and view all the answers

    Which of the following is an example of a less abundantly available TEA?

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

    What is the primary reason for using specific electron acceptors in anaerobic respiration?

    <p>To generate ATP through phosphorylation</p> Signup and view all the answers

    What role do organic compounds play in respiration?

    <p>Organic compounds serve as primary electron donors.</p> Signup and view all the answers

    Which of the following is not a commonly used TEA in anaerobic respiration?

    <p>Hydrogen sulfide</p> Signup and view all the answers

    What factor primarily determines the choice of electron acceptors in anaerobic respiration?

    <p>Free energy yield from reactions</p> Signup and view all the answers

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