Temperature or pH at which an enzyme works best is called the what?

Temperature or pH at which an enzyme works best is called the what?

• A. Protease enzyme
• B. Enzyme specificity
• C. Substrate
• D. Optimum

Answer: (D)

Enzymes have a particular set of conditions—especially temperature and pH—under which their active site is correctly shaped to bind the substrate and catalyse the reaction most efficiently. This best-working condition is called the optimum. At the optimum, the reaction rate is maximized; if you move away from it, activity drops because the enzyme may become less well shaped or even denature, and the substrate may bind less effectively. The other options describe what the enzyme is or does, not the conditions for maximum activity. A protease enzyme is simply a type of enzyme that digests proteins. Enzyme specificity refers to which substrate or reaction an enzyme can catalyse. Substrate is the molecule that the enzyme acts on.

Enzymes have a particular set of conditions—especially temperature and pH—under which their active site is correctly shaped to bind the substrate and catalyse the reaction most efficiently. This best-working condition is called the optimum. At the optimum, the reaction rate is maximized; if you move away from it, activity drops because the enzyme may become less well shaped or even denature, and the substrate may bind less effectively.

The other options describe what the enzyme is or does, not the conditions for maximum activity. A protease enzyme is simply a type of enzyme that digests proteins. Enzyme specificity refers to which substrate or reaction an enzyme can catalyse. Substrate is the molecule that the enzyme acts on.