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Enzymes are used to alter or speed up reaction,enzymes are proteinous in nature,enymes are not used up in the reaction,catabolism is breaking down of inorganic molecule ingested as food into d body,e.grespiration control by enzymds while anabolism is the building up of inorganic molecule from a simple one's in their enviroment,e.g formation of glucose frm glycogen is by the help of enymes..
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