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Fermentation: Types, Efficiency and ATP Production

Learn about fermentation and its role in generating energy under anaerobic conditions. Compare the energy efficiency of anaerobic and aerobic respiration. Discover the different pathways and products of fermentation in various organisms.

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Fermentation: Types, Efficiency and ATP Production

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  1. Section 5 – Photosynthesis &Cellular Respiration Part 4: Fermentation

  2. Part 2: Fermentation Organisms use fermentation to generate energy under anaerobicconditions, meaning withoutoxygen

  3. Part 2: Fermentation Objectives: Explain how two types of fermentation are used to assist ATP production Compare the energy efficiency of anaerobic v aerobic respiration

  4. Part 2: Fermentation Fermentation When O2 is lowor absent, glycolysis is followed by a fermentation pathway in the cytoplasm.

  5. Part 2: Fermentation Fermentation Because glycolysis and fermentation pathways occur in the absence of oxygen, they are referred to as anaerobic respiration

  6. Part 2: Fermentation Fermentation Fermentation does not create ATP. However, under anaerobic conditions, ATP production, will STOP without it! Here’s why…

  7. Part 2: Fermentation Fermentation Fermentation uses NADH from glycolysis and releases NAD. This NAD is needed for glycolysis. Therefore, without fermentation to release NAD, glycolysis and its net yield of 2 ATP, will cease.

  8. Fermentation uses NADH from glycolysis and releases NAD. This NAD is needed for glycolysis. Therefore, without fermentation to release NAD, glycolysis and its net yield of 2 ATP, will cease.

  9. Part 2: Fermentation Fermentation 1. Alcohol fermentation produces CO2 and ethyl alcohol

  10. Part 2: Fermentation Fermentation Used by yeast and other microorganisms

  11. Part 2: Fermentation Fermentation Produces alcohol and releases CO2 as “waste” (causes bread to rise)

  12. Part 2: Fermentation Fermentation If yeast produce alcohol through fermentation, why don’t you get drunk from eating bread?

  13. Part 2: Fermentation Fermentation 2. Lactic acid fermentation produces lactic acid

  14. Part 2: Fermentation Fermentation Used by most organisms,including humans

  15. Part 2: Fermentation Fermentation Produces yogurt, pickles, and sauerkraut

  16. Part 2: Fermentation Fermentation In animals, lactic acid travels from the muscles to the liver where it is converted back to pyruvate.

  17. Part 2: Fermentation Why are there different pathways in different organisms? Different types of fermentation result from different enzymes. Remember: DNA → protiens→ enzymes → chemical reactions/pathways

  18. Part 2: Fermentation Use the image below to compare the total ATP produced by one glucose from aerobic vs. anaerobic respiration. Which is more efficient?

  19. Part 2: Fermentation

  20. Part 2: Fermentation Comparing Aerobic and Anaerobic Respiration Anaerobic respiration is much less energy efficient than aerobic respiration!

  21. Part 2: Fermentation Comparing Aerobic and Anaerobic Respiration Per glucose molecule, 2 ATP (w/o O2) vs. ~38 ATP (w/ O2)

  22. Part 2: Fermentation Comparing Aerobic and Anaerobic Respiration Some yeast and bacteria have evolved to function for extended periods of time without oxygen

  23. Part 2: Fermentation Comparing Aerobic and Anaerobic Respiration They are small, simple and do not require much energy

  24. Part 2: Fermentation Comparing Aerobic and Anaerobic Respiration Animals have much greater energy needs! Therefore, they require oxygen in order to yield as much ATP as possible.

  25. Part 2: Fermentation Comparing Aerobic and Anaerobic Respiration Increasing aerobic activity causes an increase in breathing rate

  26. Part 2: Fermentation Comparing Aerobic and Anaerobic Respiration Increased breathing eliminates CO2 waste from aerobic respiration and supplies O2needed for maximum ATP production

  27. Part 2: Fermentation Read pgs 262-265

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