- Hexokinase: Involved in the first step of glycolysis, converting glucose to glucose-6-phosphate. - Lactate Dehydrogenase: Converts pyruvate to lactate in anaerobic conditions. - Citrate Synthase: Catalyzes the first step of the citric acid cycle. - Cytochrome C Oxidase: A critical enzyme in the electron transport chain of oxidative phosphorylation.