Necessity of oxygen in an/aerobic respiration

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In summary, based on the conversation, yeast cells can produce ATP through fermentation or cellular respiration, depending on the presence of oxygen. When oxygen is present, they consume glucose slower, indicating that aerobic metabolism is more efficient and produces more ATP per glucose molecule. This supports option b, which states that aerobic metabolism is more efficient in producing ATP.
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runner2392
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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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Correct.
 

Related to Necessity of oxygen in an/aerobic respiration

1. Why is oxygen necessary for aerobic respiration?

Oxygen is necessary for aerobic respiration because it acts as the final electron acceptor in the electron transport chain. This allows for the production of ATP, which is the main source of energy for cellular processes. Without oxygen, the electron transport chain cannot function, and aerobic respiration cannot occur.

2. What happens if there is no oxygen present during aerobic respiration?

If there is no oxygen present during aerobic respiration, the process cannot be completed. Without oxygen, the electron transport chain cannot function, and the production of ATP cannot occur. Instead, the cell will resort to anaerobic respiration, which produces much less ATP and can lead to the build-up of lactic acid, causing muscle fatigue.

3. How does oxygen enter the body for aerobic respiration?

Oxygen enters the body through the respiratory system, specifically through the lungs. When we breathe in, oxygen is taken in through the alveoli in the lungs and diffuses into the bloodstream. From there, it is transported to cells throughout the body for use in aerobic respiration.

4. Can organisms survive without oxygen for aerobic respiration?

No, organisms cannot survive without oxygen for aerobic respiration. While some organisms, such as bacteria, can survive and carry out anaerobic respiration without oxygen, they still require oxygen for aerobic respiration to occur. Without oxygen, cells cannot produce enough ATP to sustain life.

5. Is oxygen used up during aerobic respiration?

Oxygen is used up during aerobic respiration as it is the final electron acceptor in the electron transport chain. However, it is continuously replenished through respiration and the oxygen cycle on Earth. Without this replenishment, aerobic respiration would not be possible, and oxygen levels in the atmosphere would decrease, leading to potential negative effects on all living organisms.

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