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Cellular Respiration

Cellular Respiration. Chapter 8.3. Animal. Mitochondria. Plant. Cellular Respiration. Catabolic pathway Organic sugars are broken down to release energy for the cell Electrons are used for energy (opposite of photosynthesis). C 6 H 12 O 6 + 6 O 2 6 CO 2 + 6 H 2 O.

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Cellular Respiration

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  1. Cellular Respiration Chapter 8.3

  2. Animal Mitochondria Plant

  3. Cellular Respiration • Catabolic pathway • Organic sugarsarebroken down to release energy for the cell • Electrons are used for energy • (opposite of photosynthesis) C6H12O6 + 6 O2 6 CO2 + 6 H2O

  4. Cellular Respiration Electron Transport Krebs Cycle Glycolysis Anaerobic: Does not require oxygen Aerobic: Requires oxygen

  5. Mitochondria Intermembrane space Outer membrane Inner membrane Matrix

  6. Glycolysis • Overall Purpose: • Initial break down of GLUCOSE to release energy • Produces ATP and NADH molecules for energy storage • Takes place in the…. • CYTOPLASM • Reactants: • Glucose • (ADP & NAD+) • Products: • Two PYRUVATE molecules • (ATP & NADH)

  7. Krebs Cycle (Citric Acid Cycle) • Overall Purpose: • In the presence of oxygen, pyruvate is broken down to carbon dioxide (CO2) • Takes place in the…. • MITOCHONDRIAL MATRIX • Reactants: • Pyruvate • (ADP, NAD+, & FAD) • Products: • CO2 • (ATP, NADH, & FADH2)

  8. Electron Transport • Overall Purpose: • High-energy electrons and hydrogen ions from NADH and FADH2 are used to convert ADP to ATP • Electrons from NADH and FADH2 are passed to the electron transport chain • Oxygen picks up the electrons (and hydrogen) to make water • Hydrogen ions flow through ATP synthase to make ATP • Takes place in the…. • INNER MITOCHONDRIAL MEMBRANE • Reactants: • (NADH & FADH2) • Oxygen • Products: • (NAD & FAD) • water

  9. What about bacteria? • Prokaryotic cells (bacteria) don’t have mitochondria… • Electron transport takes place in the cell membrane!

  10. Mr. Anderson’s Podcast (Bozemanbiology): • http://www.youtube.com/watch?v=Gh2P5CmCC0M

  11. Lactic Acid Fermentation • The equation for lactic acid fermentation • after glycolysis is: • pyruvic acid + NADH → lactic acid + NAD+

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