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Process that requires a net input of energy as it proceeds from start to finish.
Anabolic reactions are endergonic reactions. The net input of energy is typically supplied by ATP hydrolysis and the ATP in turn is typically supplied by exergonic reactions, that is, by catabolic reactions.
One can view endergonic reactions as "uphill", non-spontaneous, movement away from equilibrium, etc. Cooking lunch is an endergonic reaction. Indeed, the production of what you are eating for lunch by and large involved endergonic reactions whether photosynthesis by plants or anabolic reactions within the animals (or fungi!) that consume the plants.
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