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Cellular Respiration

Cellular Respiration. Converting Chemical Energy from Carbohydrates into Chemical Energy of ATP. A. Cellular Respiration (Aerobic ). Purpose: Produce energy in the form of ATP. This process occurs in the mitochondria of cells. What organisms have mitochondria?.

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Cellular Respiration

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  1. Cellular Respiration Converting Chemical Energy from Carbohydrates into Chemical Energy of ATP

  2. A. Cellular Respiration (Aerobic ) • Purpose: Produce energy in the form of ATP. This process occurs in the mitochondria of cells. What organisms have mitochondria? All eukaryotes including plants, animals, and fungi. 2. Equation for Cellular Respiration: C6H12O6 + 6 O2 6 H2O + 6 CO2 + Energy

  3. 3. Overview of Aerobic Cellular Respiration - In the mitochondriaof living things, oxygen helps the break- down of sugars (glucose) to release energy useable by the cell (ATP) O2 Pyruvic acid Mitochondria H+ Glucose Electron Transport Chain Krebs Cycle Glycolysis 1 gram holds 3811 calories H2O CO2 2 342

  4. B. A Closer Look at Aerobic Cellular Respiration 1. Glycolysis (Anaerobic respiration) occurs in cytoplasm. Glucose (6 carbon sugar) breaks down into pyruvic acid (3 carbon) molecules and ATP (energy)

  5. A Closer Look at Aerobic Cellular Respiration 2. Krebs’s Cycle occurs in the matrix of the mitochondria. • Pyruvic acid breaks down into carbon dioxide and ATP 3. Electron Transport Chain also occurs in the mitochondria • Electrons generated earlier get together with oxygen to make water and energy Named after this guy: Hans Krebs

  6. C. Energy Totals 36 ATP molecules are released from one glucose molecule A molecule of glucose contains 686 kcal of stored energy. A molecule of ATP stores 7.5 kcal of energy. How efficient is aerobic cellular respiration?

  7. D. Anaerobic Cellular Respiration • Glycolysis must find another pathway when there is no oxygen present. • Fermentation releases energy from pyruvic acid and NADH made during glycolysis. • The two main types of fermentation are: alcoholic fermentation and lactic acid fermentation. In what conditions might you need energy but not have ample oxygen? Answer: when you’re doing this:

  8. D. Anaerobic Cellular Respiration Look at this diagram of a plant cell. Do you think plant cells conduct cellular respiration? Why or why not?

  9. E. Relationships 1. Aerobic Cellular Respiration and Breathing • Oxygen is taken in by humans as we breathe and used for cellular respiration. • Oxygen is required for the electron transport chain to operate and ATP to be synthesized.

  10. Energy Released through Cellular Respiration • 36 ATP units are released from one glucose unit • A unit of glucose molecules contains 686 kcal of stored energy. A unit of ATP stores 7.5 kcal. If 36 ATP units are released from the breakdown of glucose, how efficient is the transformation from energy stored in glucose to energy released as ATP?

  11. E. Relationships 2. Aerobic Cellular Respiration and Photosynthesis • These are “opposite processes.” • The products of photosynthesis are the reactants of respiration and vice versa. • Energy stored through photosynthesis is released through cellular respiration

  12. Cellular Respiration YouTube Video

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