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Catabolic reactions give out energy. They are exergonic. In a catabolic reaction large molecules are broken down into smaller ones. For example, the reverse of the condensation reactions described above, i.e. hydrolysis reactions, are catabolic.
there are 2 types of enzyme controlled reactions: Degradation (catabolic) when an enzyme breaks down large molecules into smaller ones eg. digestion. Synthesis (anaboli â¦ c) when the enzyme builds up larger molecules from smaller ones. eg photosynthesis or protein synthesis.