Optimal pH refers to the specific value at which a particular enzymatic reaction occurs at its maximum rate. It varies for different enzymes based on their environment and nature.
Enzyme: Proteins that act as biological catalysts, speeding up reactions that take place in cells.
pH: A measure of the acidity or basicity of an aqueous solution.
Homeostasis: The ability of a system or living organism to adjust its internal environment to maintain a stable equilibrium.