AP BIOLOGY

Detailed explanation-1: -Description. Enzyme activity is at its maximum value at the optimum pH. As the pH value is increased above or decreased below the optimum pH the enzyme activity decreases.

Detailed explanation-2: -The rate of an enzyme-catalyzed reaction increases with an increase in the concentration of an enzyme. At low temperatures, an increase in temperature increases the rate of an enzyme-catalyzed reaction. At higher temperatures, the protein is denatured, and the rate of the reaction dramatically decreases.

Detailed explanation-3: -The closer the pH is to 7, the higher the reaction rate. As the pH distances from the optimum, however, the reaction rate decreases because the shape of the enzyme’s active site begins to deform, until it becomes denatured and the substrate can no longer fit the active site.

Detailed explanation-4: -The rate of enzymatic reaction depends on pH of the medium. Each enzyme has an optimum pH, where the rate of enzymatic reaction is maximum. At higher or lower pH, the rate of an enzymatic reaction decreases. For most enzymes, the optimum pH lies in the range from pH 5 to pH 9.