Cellular respiration is the reason we as humans produce carb

Cellular respiration is the reason we (as humans) produce carbon dioxide. Which stage(s) of respiration produce(s) carbon dioxide? (choose all that apply) Note: you must get this question entirely right for it to be counted correct.

Glycolysis

Pyruvate processing

Citric acid cycle

Electron transport & Oxidative phosphorylation

Solution

Glycolysis produces two molecules of pyruvic acid, which in absence of oxygen (anaerobic) it is further broken, and releases CO2 molecule.

During Krebs Cycle or citric acid cycle: The decarboxylation of isocitrate into Succinyl-CoA during citric acid cycle releases two molecules of Co₂ through an intermediate production of alpha-ketoglutarate.

Therefore, the correct options are: Pyruvate processing and Citric acid cycle.