In terms of energy changes, ATP synthesis is ______ and glucose ______ provides the energy.

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Multiple Choice

In terms of energy changes, ATP synthesis is ______ and glucose ______ provides the energy.

Energy released from food fuels is used to power energy-storing steps. ATP synthesis requires input of energy to form the high-energy phosphate bond, so it is endergonic. Glucose oxidation, by contrast, releases energy as electrons are removed in a series of redox steps, making it an exergonic process. The energy liberated during glucose oxidation is captured to drive ATP formation. In metabolism, oxidation is the process that provides the usable energy, while reduction would store energy. This pairing—ATP synthesis being endergonic and glucose oxidation providing the energy—is the correct way to describe how energy flow works in cells.

Energy released from food fuels is used to power energy-storing steps. ATP synthesis requires input of energy to form the high-energy phosphate bond, so it is endergonic. Glucose oxidation, by contrast, releases energy as electrons are removed in a series of redox steps, making it an exergonic process. The energy liberated during glucose oxidation is captured to drive ATP formation. In metabolism, oxidation is the process that provides the usable energy, while reduction would store energy. This pairing—ATP synthesis being endergonic and glucose oxidation providing the energy—is the correct way to describe how energy flow works in cells.

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