In cell respiration, which molecule serves as the main energy carrier produced?

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Multiple Choice

In cell respiration, which molecule serves as the main energy carrier produced?

Explanation:
ATP is the cell’s main energy currency produced during respiration. Energy is captured when ADP is phosphorylated to ATP in glycolysis, the citric acid cycle, and especially during oxidative phosphorylation, where NADH and FADH2 deliver electrons to the electron transport chain to drive ATP synthase. NADH and FADH2 are high-energy electron carriers, not the energy currency itself, and ADP is the substrate that ATP is made from. So the molecule most directly produced to power cellular work is ATP.

ATP is the cell’s main energy currency produced during respiration. Energy is captured when ADP is phosphorylated to ATP in glycolysis, the citric acid cycle, and especially during oxidative phosphorylation, where NADH and FADH2 deliver electrons to the electron transport chain to drive ATP synthase. NADH and FADH2 are high-energy electron carriers, not the energy currency itself, and ADP is the substrate that ATP is made from. So the molecule most directly produced to power cellular work is ATP.

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