Anabolism

Anabolism (from Greek ana, “upward”, and ballein, “to throw”) is the set of metabolic pathways that construct molecules from smaller units. These reactions require energy. One way of categorizing metabolic processes, whether at the cellular, organ or organism level is as ‘anabolic’ or as ‘catabolic’, which is the opposite. Anabolism is powered by catabolism, where large molecules are broken down into smaller parts and then used up in respiration.

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