Which of the following correctly describe the number of electrons transferred fr

Question

Which of the following correctly describe the number of electrons transferred from glucose to a terminal electron acceptor via fermentation or respiration of O_2? A. Fermentation of glucose to lactate involves the transfer of 4 electrons. B. Fermentation of glucose to lactate involves the transfer of 8 electrons. C. Oxidation of glucose to CO_2 involves the transfer of 12 electrons. D. Oxidation of glucose to CO_2 involves the transfer of 24 electrons. E. Oxidation of glucose to CO_2 involves the transfer of 36 electrons.

Explanation / Answer

Answer : E( Oxidation of glucose to CO2 involves the transfer of 36 electrons).

Explanation: C6H12O6 + 6O2 + 36ADP3- + 36H+ ->6CO2 +36ATP4- +42H20.

The complete aerobic oxidation of glucose is coupled to the synthesis of as many as 36 molecules of ATP.

Glycolysis,the initial stage of glucose metabolism, takes place in the cytosol(Unstructured aqueous phase of the cytoplasm excluding organelles, membranes, and insoluble cytoskeletal components) and does not involve molecular O2. It produces a small amount of ATP and the three-carbon compound pyruvate. In aerobic cells, pyruvate formed in glycolysis is transported into the mitochondria, where it is oxidized by O2 to CO2. Via chemiosmotic coupling, the oxidation of pyruvate in the mitochondria generates the bulk of the ATP produced during the conversion of glucose to CO2

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