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9-1 Chemical Pathways

Explore the chemical pathways of cellular respiration, from glycolysis to fermentation, that release energy from food. Learn about the connection between photosynthesis and cellular respiration.

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9-1 Chemical Pathways

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  1. 9-1 Chemical Pathways Pg. 221

  2. A. Chemical Energy and Food • 1. A calorie is the amount of energy needed to raise the temperature of 1 gram of water 1°C.

  3. A. Chemical Energy and Food • 2. Glycolysis is a pathway that releases a small amount of energy.

  4. B. Overview of Cellular Respiration • 1. Cellular Respiration is the process that releases energy by breaking down glucose and other food molecules in the presence of oxygen.

  5. B. Overview of Cellular Respiration • Think about it……. • Reactants • Products • Where do the products go?

  6. B. Overview of Cellular Respiration

  7. C. Glycolysis • 1. The process where 1 molecule of glucose is broken in half, making 2 molecules of pyruvic acid (3-carbon compound).

  8. C. Glycolysis • 2. The cell needs to put in 2 ATP to make 4 ATP. The Profit is 2 ATP.

  9. C. Glycolysis • 3. NADP+ accepts 2 high energy electrons and carries them until they are transferred to other molecules.

  10. D. Fermentation • 1. Fermentation releases energy from food by making ATP without Oxygen. • 2. Anaerobic means “without air”.

  11. D. Fermentation • 3. Types of fermentation: Alcoholic and Lactic • a. Alcoholic Fermentation (causes bread to rise. • Pyruvic Acid + NADH  Alcohol + CO2 + NAD+

  12. D. Fermentation • b. Lactic Acid Fermenation (Produced in muscles when there is not enough O2 ) • Pyruvic Acid + NADH  Lactic Acid + NAD+

  13. Exit Slip • Summarize Cellular Respiration. • Describe the relationship between photosynthesis and cellular respiration.

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