Thursday WK 5 Notes

Carbohydrate Catabolism

2 Major Process:

  1. 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

  1. Glycolysis – Glucose is oxidized, producing 2 molecules of pyruvic acid (Does not require Oxygen)
  2. Acetyl COA Production – Pyruvic acid gets further oxidized, producing 2 acetyl coenzyme A (COA) molecules
  3. Krebs Cycle or Citric Acid Cycle – 2 molecules of Acetyl COA get completely oxidized
  4. 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.

3 Stages:

  1. Energy Investment Stage
  2. Lysis Stage
  3. Energy-Conserving Stage

ATP is made by substrate-level phosphorylation during glycolysis.


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