2 Major Process:
- Cellular Respiration – breakdown (oxidation) of glucose or other molecules to generate ATP (INORGANIC)
- Anaerobic Respiration – uses inorganic molecule other than oxygen as final electron acceptor.
- Aerobic Respiration – uses oxygen as the final electron acceptor
2. Fermentation – uses ORGANIC molecule as final electron acceptor.
4 Stages of Aerobic Cellular Respiration
- Glycolysis – Glucose is oxidized, producing 2 molecules of pyruvic acid (Does not require Oxygen)
- Acetyl COA Production – Pyruvic acid gets further oxidized, producing 2 acetyl coenzyme A (COA) molecules
- Krebs Cycle or Citric Acid Cycle – 2 molecules of Acetyl COA get completely oxidized
- Electron Transport Chain & Chemiosmosis – Hydrogens (electrons & protons) go through a series of Redox RXNs, releasing energy for making 34 ATP.
Carbohydrate Catabolism: Gycolysis
Glucose is broken down into 2 molecules of pyruvate, producing 2 ATP (net) per glucose molecules.
- Energy Investment Stage
- Lysis Stage
- Energy-Conserving Stage
ATP is made by substrate-level phosphorylation during glycolysis.