Glucose and other sugars are broken down into _____ and other energy molecules.

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Multiple Choice

Glucose and other sugars are broken down into _____ and other energy molecules.

Explanation:
Breaking down glucose ultimately yields ATP, the cell’s usable energy molecule. As glucose is oxidized through glycolysis and the citric acid cycle, some ATP is produced directly on substrate‑level phosphorylation steps. At the same time, energy is captured in the form of high‑energy electron carriers, NADH and FADH2, which donate electrons to the electron transport chain to drive the production of a large amount of ATP. CO2 is released as a waste product during these oxidation steps, not stored as usable energy. So ATP is the immediate energy currency generated from glucose breakdown, while NADH and FADH2 are carriers that help generate more ATP, and CO2 is released.

Breaking down glucose ultimately yields ATP, the cell’s usable energy molecule. As glucose is oxidized through glycolysis and the citric acid cycle, some ATP is produced directly on substrate‑level phosphorylation steps. At the same time, energy is captured in the form of high‑energy electron carriers, NADH and FADH2, which donate electrons to the electron transport chain to drive the production of a large amount of ATP. CO2 is released as a waste product during these oxidation steps, not stored as usable energy. So ATP is the immediate energy currency generated from glucose breakdown, while NADH and FADH2 are carriers that help generate more ATP, and CO2 is released.

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