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Unveiling the Mystery of Cellular Respiration

Dive into the process of cellular respiration, where mitochondria break down food molecules to produce ATP energy. Explore the stages, including glycolysis and the citric acid cycle, and understand the importance of mitochondria as the powerhouse of the cell.

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Unveiling the Mystery of Cellular Respiration

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  1. Energy in a Cell Cellular Respiration

  2. Cellular Respiration • Cellularrespiration: process where mitochondria break down food molecules to produce ATP. (energy)

  3. Cellular Respiration • Three stages in cellular respiration: glycolysis, citric acid cycle, and electron transport chain.

  4. Cellular Respiration • Mitochondria is called the powerhouse of the cell because it is the site of cellular respiration.

  5. Cellular Respiration • More work a cell does, the more mitochondria it has.

  6. Cellular Respiration • Glycolysis: first stage of cellular respiration.

  7. Cellular Respiration • Takes place in the cytoplasm of the cell.

  8. Cellular Respiration • One C6H12O6 (glucose) is brokendown into 2 pyruvic acid molecules. (a 3 C molecule)

  9. Cellular Respiration • For every glucose molecule broken down, 2ATP molecules are produced.

  10. Cellular Respiration • Next, the pyruvic acid moves into the mitochondria.

  11. Cellular Respiration • Citric acid cycle or Kreb’s cycle : Pyruvic acid is broken down in a series of reactions to produce 2CO2 and 1ATP and electrons are passed on to the electron transport chain.

  12. Cellular Respiration • Electrontransportchain: series of proteins where electrons are passed.

  13. Cellular Respiration • Energy is released as electrons are passed from one molecule to the next.

  14. Cellular Respiration • The released energy is used to make ATP.

  15. Overall: • For every glucose that enters cellular respiration 36 ATP are produced.

  16. Cellular Respiration • Cellular respiration can be classified as aerobic: cellular respiration occurs in the presence of O2.

  17. Cellular Respiration • Most efficient form of respiration.

  18. Cellular Respiration • Krebs cycle is aerobic respiration.

  19. Cellular Respiration • Cellular respiration can also be classified as anaerobic: respiration that proceeds in the absence of O2.

  20. Cellular Respiration • Glycolysis is anaerobic respiration.

  21. Cellular Respiration • Not as efficient as aerobic. Only 2ATP formed.

  22. Cellular Respiration • In the absence of O2, pyruvic acid backs up and is eliminated2 ways:

  23. Cellular Respiration • In you and me, pyruvic acid is converted to lacticacid and builds up in the muscles.

  24. Cellular Respiration • In yeast, pyruvic acid converted to CO2 and ethylalcohol. This makes bread rise.

  25. Cellular Respiration • Anaerobic respiration is also called fermentation.

  26. Cellular Respiration • Which molecule has the most stored energy: fat or carbohydrate?

  27. Cellular Respiration • Fat – it has available energy for 51ATP.

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