EVERYDAY SCIENCE

Detailed explanation-1: -There are three main steps of cellular respiration: glycolysis; the citric acid (TCA) or the Krebs cycle; and the electron transport chain, where oxidative phosphorylation occurs. The TCA cycle and oxidative phosphorylation require oxygen, while glycolysis can occur in anaerobic conditions.

Detailed explanation-2: -Thus the correct order of the stages in cellular respiration is: Glycolysis-Oxidative decarboxylation-Krebs cycle-Electron transport chain-Oxidative phosphorylation.

Detailed explanation-3: -Aerobic respiration involves four stages: glycolysis, a transition reaction that forms acetyl coenzyme A, the citric acid (Krebs) cycle, and an electron transport chain and chemiosmosis.

Detailed explanation-4: -Glycolysis – Partial breakdown of Glucose to Pyruvic acid (Anaerobic) Krebs Cycle – Complete oxidation of Pyruvate to release Carbon dioxide (Aerobic respiration) Electron Transport system – Oxidation of NADH and FADH2 to generate ATP.

Detailed explanation-5: -There are four stages: glycolysis, the link reaction, the Krebs cycle and oxidative phosphorylation. During glycolysis, glucose molecules (six-carbon molecules) are split into two pyruvates (three-carbon molecules) during a sequence of enzyme-controlled reactions. This occurs in both aerobic and anaerobic respiration.