Questions and Answers
Which of the following is a product of anaerobic cellular respiration when carbon dioxide is used as the terminal electron acceptor?
What role do sulfate-reducing bacteria play in anaerobic respiration?
Which of the following statements about anaerobic cellular respiration is true?
Where are methanogens primarily found?
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Which alternative electron acceptor is not mentioned as being used in anaerobic cellular respiration?
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Study Notes
Anaerobic Cellular Respiration
- Functions similarly to aerobic respiration but utilizes alternative electron acceptors instead of oxygen.
- Common electron acceptors in anaerobic respiration include sulfate (SO42−SO_4^{2-}SO42−), nitrate (NO3−NO_3^-NO3−), and sulfur.
Prokaryotic Utilization
- Certain prokaryotes, including bacteria and archaea, utilize anaerobic respiration to metabolize various fuels.
- Methanogens are a type of archaea that use carbon dioxide (CO2CO_2CO2) as a terminal electron acceptor, producing methane (CH4CH_4CH4) as a by-product.
- Methanogens are predominantly found in environments like soil and the digestive systems of ruminants, such as cows and sheep.
Sulfate-Reducing Bacteria
- Sulfate-reducing bacteria and archaea utilize sulfate as their terminal electron acceptor.
- The by-product of this process is hydrogen sulfide (H2SH_2SH2S), which can contribute to the characteristic smell of rotten eggs.
Environmental Implications
- Coastal waters may exhibit blooms of sulfate-reducing bacteria, visibly presenting as large green patches.
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Description
Test your knowledge on anaerobic cellular respiration with this quiz. Explore key concepts, such as electron transport chains, alternative electron acceptors, and the roles of prokaryotes in this process. Get ready to challenge your understanding of microbial metabolism!
