Cell Respiration

• Anaerobic Respiration:

  • Glycolysis
  • Fermentation
  • Alcohol
  • Lactic Acid
• Cellular Respiration
• Aerobic Respiration:

  • Krebs Cycle
  • Electron Transport Chain
• Glycolysis:

  • Outline: glucose → pyruvic acid
  • Takes place in the cytoplasm
• Pyruvic Acid can undergo Aerobic or Anaerobic processes:

  • Aerobic: in mitochondria
  • Anaerobic:
  • Fermentation in muscles (lactic acid)
  • Fermentation in yeast (alcohol)
• Lactic Acid Fermentation:

  • pyruvic acid + NAD+ → lactic acid
  • Anaerobic Respiration Fermentation
  • No oxygen needed
• Alcohol Fermentation:

  • pyruvic acid + NAD+ → CO2 + ethanol
  • Anaerobic Respiration Fermentation
  • No oxygen needed
• Aerobic Respiration:

  • Takes place in the matrix of mitochondria
  • pyruvic acid → CO2 + NADH H+
  • CoA converts pyruvic acid to acetyl CoA
  • Acetyl CoA combines with oxaloacetic acid to form citric acid
  • Results in the production of CO2, NADH H+, ATP, and FADH2
• Krebs Cycle (TCA) or Citric Acid Cycle:

  • Takes place in the inner mitochondria
  • Involves the recycling of CoA for the 2nd Pyruvic Acid and 2nd turn of the Krebs Cycle
• Electron Transport Chain – Oxidative Phosphorylation:

  • Involves electrons and H+ moving through ATP Synthase
  • Results in the production of ATP
  • Three ATP produced for every two electrons
• Summary of Maximum Energy Yield from the Oxidation of One Molecule of Glucose:

  • Glycolysis: 2 ATP
  • Krebs Cycle: 2 ATP
  • Electron Transport Chain: 34 ATP
  • Total: 38 ATP