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1. The set of metabolic pathways that construct molecules from smaller units. These reactions require energy. (

2. The constructive metabolism of the body, as distinguished from catabolism. (

3. The phase of metabolism in which simple substances are synthesized into the complex materials of living tissue. (The American Heritage® Dictionary of the English Language, Fourth Edition)

4. The process involving a sequence of chemical reactions that constructs or synthesizes molecules from smaller units, usually requiring input of energy (ATP) in the process. (

5. The synthesis in living organisms of more complex substances (e.g., living tissue) from simpler ones together with the storage of energy). (

Word origin: From Greek ana, “upward”, and ballein, “to throw”

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