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Cellular Respiration

Cellular Respiration. 6O 2 + C 6 H 12 O 6 6CO 2 + 6H 2 O + ATP. Cellular Respiration. Processes that releases energy by breaking down organic compounds in the presence of oxygen The energy released is ATP. Glycolysis. First step (pathway) in breaking down food

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Cellular Respiration

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  1. Cellular Respiration 6O2 + C6H12O66CO2 + 6H2O + ATP

  2. Cellular Respiration • Processes that releases energy by breaking down organic compounds in the presence of oxygen • The energy released is ATP

  3. Glycolysis • First step (pathway) in breaking down food • Glycolysis breaks glucose in 1/2 • C3H6O3 • This molecule is called pyruvic acid • We get 2 ATPs during glycolysis • Glycolysis takes place in the cytoplasm of cells

  4. Glycolysis Pyruvic Acid Glucose Pyruvic Acid To the Electron Transport Chain

  5. Step 2 • Two options for the second step/pathway • If oxygen (aerobic) is present = Krebs Cycle Electron Transport Chain • In anaerobic conditions (no oxygen) = Fermentation

  6. Krebs Cycle & Electron Transport Chain • In aerobic conditions the pyruvic acid from glycolysis gets modified and transported to the mitochondria • Acetyl-Co Enzyme A • Mitochondria = power house

  7. Krebs Cycle • Modified Pyruvic acid goes through a five step process that produces some ATP, Carbon Dioxide, and electron holders • Electron holders are molecules that can hold electrons and move them to be used for other processes • FAD and NAD • FADH2 and NADH

  8. Electron Transport Chain • The electron holders from the Krebs cycle enter the E.T.C. • During this step water is produced and the most amount of energy =36 ATPs

  9. Figure 9–2 Cellular Respiration: An Overview Mitochondrion Electrons carried in NADH Electrons carried in NADH and FADH2 Pyruvic acid Glucose Electron Transport Chain Krebs Cycle Glycolysis Cytoplasm Mitochondrion

  10. Energy • Aerobic respiration gives 38 ATPs • Anaerobic respiration gives 2 ATPs • Cellular Respiration occurs in both plants and animals • Plants and animals need the energy to create macromolecules to keep cells alive.

  11. If NO OXYGEN IS PRESENT: Two Types of Fermentation • Alcoholic Fermentation • Yeast and other microorganisms • Produces carbon dioxide for bread, beer, and wine production • Lactic Acid Fermentation • Microorganisms  Produces yogurt and cheese • Muscle cells cramps and fatigue

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