Enzyme activity refers to the rate at which enzymes catalyze reactions in living organisms. Synonyms for this term include enzyme kinetics, enzyme function, enzyme catalysis, and enzyme efficiency. Enzyme kinetics explains how enzymes interact with substrates and how fast they can convert them into products. Enzyme function refers to the specific action of the enzyme in a biochemical pathway. Enzyme catalysis describes the process of the enzyme accelerating the reaction through lowering the activation energy required. Enzyme efficiency is the ability of the enzyme to catalyze the reaction efficiently, especially in terms of the substrate concentration. Overall, these synonyms for enzyme activity all describe the dynamic role of enzymes in biochemical reactions.