Stepwise Oxidation of Glucose — NEET Biology
📚 Practice ConceptIf this energy is to be useful to the cell, it should be able to utilise it to synthesise other molecules that the cell requires. The strategy that the plant cell uses is to catabolise the glucose molecule in such a way that not all the liberated energy goes out as heat. The key is to oxidise glucose not in one step but in several small steps enabling some steps to be just large enough such that the energy released can be coupled to ATP synthesis. How this is done is, essentially, the story of respiration.
Which of the following statements regarding the energy yield and processes in aerobic respiration are NOT correct? S1: For every glucose molecule, a net of 2 ATP is gained from glycolysis and 2 ATP directly from the Krebs cycle. S2: The complete oxidation of pyruvate produces a total of 8 NADH and 2 FADH2 molecules per glucose. S3: A total of 10 NADH + H+ molecules are produced from one glucose molecule during aerobic respiration. S4: The electron transport system releases energy in a single step for ATP synthesis. S5: Oxygen acts as the final hydrogen acceptor in the electron transport system and is reduced to water.
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