Cellular Respiration Quiz

Cellular Respiration Steps

• Consists of four primary stages: Glycolysis, Pyruvate Oxidation, Citric Acid Cycle, and Oxidative Phosphorylation.

Glycolysis

• Reactants include 1 glucose molecule, 4 ADP, 4 inorganic phosphate (Pi), and 2 NAD+.
• Produces 4 ATP (with a net gain of 2 ATP), 2 NADH, and 2 pyruvate molecules.

Pyruvate Oxidation

• Reactants are 2 CoA-SH, 2 NAD+, and 2 pyruvate.
• Results in the formation of 2 NADH, 2 carbon dioxide (CO2), 2 hydrogen ions (H-), and 2 Acetyl CoA.

Citric Acid Cycle (Krebs Cycle)

• Uses 2 Acetyl CoA as reactants, converting them to 2 oxaloacetate.
• Produces 4 CO2, 6 NADH, 2 FADH2, and potentially 2 ATP or GTP.

Oxidative Phosphorylation

• Requires 6 NADH, 2 FADH2, 6 O2, and ADP + P as reactants.
• Generates 26-28 ATP and 4 water (H2O) molecules as products.

Overall Cellular Respiration Equation

• Simplified equation: Glucose + Oxygen → Carbon Dioxide + Water + Adenosine Triphosphate (ATP).
• Balanced chemical equation: C6H12O6 + 6O2 → 6CO2 + 6H2O.