Redox enzymes are biological catalysts that facilitate oxidation-reduction (redox) reactions in living organisms. These enzymes help transfer electrons between molecules, playing a crucial role in metabolic processes such as cellular respiration and photosynthesis. They are essential for energy production and the synthesis of various biomolecules. Common types of redox enzymes include dehydrogenases, oxidases, and reductases. Each type has a specific function, often involving coenzymes like NAD+ or FAD that assist in the electron transfer process. By regulating these reactions, redox enzymes maintain cellular health and energy balance.