What is the difference between glycolysis, the krebs cycle, and the electron transport chain?

glycolysis is first step common in both aerobic and anaerobic type of respiration. It occurs in cytosol in this a glucose is converted into 2 molecules of pyruvate. it occurs in absence of oxygen if its anaerobic respiration pyruvate will under go fermentation if its aerobic respiration pyruvate molecule will enter in kreb cycle which occurs in mitochondrial matrix. in this NADPH2 FADPH2 is produced. finally electron transport chain(inner mitochondrial membrane) in which oxygen molecule receives the protons from NADPH2 FADPH2 and generate ATP

In the cytoplasm, glycolysis converts glucose to pyruvate. In the mitochondrial matrix, the Krebs cycle oxidizes pyruvate to produce ATP, NADH, and FADH2. In the inner mitochondrial membrane, the electron transport chain uses FADH2 and NADH to produce ATP through oxidative phosphorylation.