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Cellular Respiration

Cellular Respiration. Chapter 8 Section 3 Notes. Cellular Respiration: You get your energy this way!. Overview of Cellular Respiration. C 6 H 12 O 6 + 6O 2  6CO 2 + 6H 2 O + Energy Cellular Respiration occurs in 2 parts: An anaerobic process—does not require oxygen

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Cellular Respiration

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  1. Cellular Respiration Chapter 8 Section 3 Notes

  2. Cellular Respiration: You get your energy this way!

  3. Overview of Cellular Respiration • C6H12O6 + 6O2 6CO2 + 6H2O + Energy • Cellular Respiration occurs in 2 parts: • An anaerobic process—does not require oxygen • An aerobic process—requires oxgyen Glycolysis Krebs Cycle & Electron Transport

  4. Overview of Cellular Respiration Cellular respiration: a set of the metabolic reactions that take place in the mitochondria of cells to convert sugars/other nutrients into ATP and waste products (CO2).

  5. Glycolysis is anaerobic  doesn’t require oxygen • Aerobic  requires oxygen

  6. NET PRODUCT: 2 ATP Glycolysis • Glycolysis glucose broken down in the cytoplasm • Glycolysis produces 4 ATP but 2 are used to keep the process going, so it is actually a net of 2 • Start with: 1 Glucose molecule • Use 2 ATP molecules to convert it into a smaller compound • End with: 2 Pyruvate molecules, 4 ATP molecules

  7. Kreb’s cycle (aerobic respiration) • Kreb’s cycle, also called the Citric Acid Cycle, is the process in which pyruvate is broken down into carbon dioxide. • At the end of glycolysis, there are 2 ATP + 2 pyruvates • The pyruvate still has energy in it, so the Kreb’s Cycle breaks it down further to get it out to be used NET PRODUCT: 2 ATP

  8. Glycolysis produces 2 pyruvates so they have to go through Kreb’s cycle twice to get all the energy out!

  9. Kreb’s cycle = 6CO2 + 2 ATP + 8 NADH + 2 FADH2 • The NADH & FADH2 molecules move on to next part

  10. Electron Transport Chain In aerobic respiration, e- transport is the final step in breakdown of glucose Most of the ATP is produced at this point! NET PRODUCT: 32 ATP

  11. Total ATP from Cellular Respiration • The total ATP production for cellular respiration is 36 ATP (2 ATP from glycolysis, 2 ATP from Kreb’s cycle, 32 ATP from the electron transport chain)

  12. Anaerobic Respiration • Many prokaryotes can live without oxygen! • This pathway to produce energy this way is called fermentation a process which occurs in cytoplasm and produces small amounts of ATP without the presence of oxygen

  13. Alcohol fermentation occurs in yeast & some bacteria, pyruvate converted to ethyl alcohol & carbon dioxide

  14. Photosynthesis & Cellular Respiration • The products for photosynthesis are the reactants for cellular respiration and the products for cellular respiration are the reactants for photosynthesis, thus this is a continuous cycle.

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