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Cellular Respiration. C 6 H 12 O 6 + O 2 CO 2 + H 2 0 + energy. What we need to know. C 6 H 12 O 6 + O 2 CO 2 + H 2 0 + energy This is cellular respiration. However, we are missing all the details. It’s as if we are reading a fairy tale that begins:
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Cellular Respiration C6H12O6 + O2 CO2 + H20 + energy
What we need to know C6H12O6 + O2 CO2 + H20 + energy This is cellular respiration. However, we are missing all the details. It’s as if we are reading a fairy tale that begins: “Once upon a time…” We then flip through the pages until we get to the last page, where we read: “…and they live happily ever after.”
Gaining and losing electrons during a chemical reaction result in two different types of reactions: [Glucose loses electrons (and hydrogens)] [Oxygen gains electrons (and hydrogens)] Oxidation and Reduction Reactions Oxidation Reduction
An overview of Cellular Respiration Cytoplasm Mitochondrion High-energy electrons carried by NADH High-energy electrons carried mainly by NADH Glycolysis Krebs Cycle 2 Pyruvic acid Electron Transport Glucose
Glycolysis 2 Pyruvic acid inorganic Glucose C6H12O6
Immediately following glycolysis… but before Krebs cycle An intermediary step CoA Acetic acid Pyruvic acid Acetyl-CoA (acetyl-coenzyme A) Coenzyme A CO2
The Krebs Cycle (AKA Citric Acid Cycle) Input Output Acetic acid Krebs Cycle 2 CO2 ADP 3 NAD FAD
Electron Transport Chain (from food via NADH) 2 H 2 e Electron transport chain 2 e 2 H
Summary of Cellular Respiration Glycolysis 2 Acetyl- CoA 2 Pyruvic acid Krebs Cycle Electron Transport Glucose
Aerobic vs. Anaerobic respiration • Aerobic – • Glycolysis, Krebs, ETC • Anaerobic – • Glycolysis, Fermentation • Fermentation helps to replenish NAD+ so glycolysis can happen repeatedly.
