The complete oxidation of glucose in aerobic respiration occurs through which of the following sequence of metabolic reactions?

The complete oxidation of glucose in aerobic respiration occurs through the following sequence of metabolic reactions: GLUCOSE - GLYCOLYSIS - PYRUVATE OXIDATION - CITRIC ACID CYCLE - ELECTRON TRANSPORT CHAIN.

Explanation:

Glucose is the main metabolic fuel used by the living cells to produce energy. In the cells, glucose normally go through a series of metabolic reactions in order to produce energy in the form of ATP.

The first step of glucose oxidation is glycolysis and it leads to the production of two net ATP and pyruvate molecules. The pyruvate molecules are oxidized into acetylcoA, which is moved into the citric acid cycle (Kreb cycle). The products of citric acid cycle include NADH, FADH2 and ATP. The NADH and the FADH2 molecules are then made to go through oxidation phosphorylation (electron transport chain) process, which lead to the production of ATP.

Overall, the complete oxidation of a glucose molecule gives rise to 38 molecules of ATP, 2 of the ATP come from glycolysis, 2 from citric acid cycle and 34 from oxidative phosphorylation process.

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