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Necessity of oxygen in an/aerobic respiration

  1. Feb 17, 2012 #1
    Yeast are eukaryotic microorganisms that can produce ATP through either fermentation (anaerobic respiration) or cellular respiration (aerobic respiration), depending on whether oxygen is present, similar to animal cells. If oxygen is present, yeast cells consume glucose much more slowly than if oxygen is absent. Based on your knowledge of cellular metabolism, how can you explain this observation?

    a) Anaerobic metabolism is more efficient (produces more ATP per glucose molecule).
    b) Aerobic metabolism is more efficient (produces more ATP per glucose molecule).
    c) Cells do not need as much ATP when oxygen is present.
    d) Cells do not need as much ATP when oxygen is not present.
    e) Cell functions are suppressed when oxygen is present.

    Would it be b because more ATP is produced per glucose?
     
    Last edited: Feb 17, 2012
  2. jcsd
  3. Feb 18, 2012 #2

    Ygggdrasil

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    Science Advisor

    Correct.
     
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