Necessity of oxygen in an/aerobic respiration

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The discussion centers on the role of oxygen in yeast metabolism, specifically comparing anaerobic and aerobic respiration. It is established that aerobic metabolism is more efficient, producing more ATP per glucose molecule than anaerobic metabolism. When oxygen is present, yeast cells consume glucose at a slower rate, as they utilize aerobic respiration, which yields greater energy efficiency. The consensus confirms that option b) is correct, highlighting the superiority of aerobic respiration in ATP production.

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  • Understanding of cellular respiration processes
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  • Basic concepts of anaerobic vs. aerobic respiration
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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?
 
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