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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.
Define the two catabolic pathways: Fermentation â a partial degradation of sugars that occurs without the use of oxygen. Cellular respiration â when oxygen is consumed as a reactant along with the organic fuel; most efficient catabolic pathway; mitochondria house most of the metabolic equipment needed.Use the following terms correctly in a sentence: redox reactions, oxidation, reduction, reducing agent and oxidizing agent.In redox reactions, oxidation (the loss of electrons from one substance) and reduction (the addition of electrons to another substance) occur.efine the two catabolic pathways: Fermentation â a partial degradation of sugars that occurs without the use of oxygen. Cellular respiration â when oxygen is consumed as a reactant along with the organic fuel; most efficient catabolic pathway; mitochondria house most of the metabolic equipment needed.