The effect of temperature on the rate of lactase enzyme-catalyzed hydrolysis of lactose into glucose and galactose can be explained by the concept of enzyme kinetics and the Arrhenius equation. Enzymes, including lactase, are proteins that act as biological catalysts, speeding up the rate of chemical reactions without being consumed in the process. The rate at which enzymes catalyze reactions is influenced by several factors, including temperature.As the temperature increases, the kinetic energy of the enzyme and substrate molecules also increases, leading to more frequent collisions between them. This results in an increased rate of lactose hydrolysis into glucose and galactose. However, this increase in reaction rate is only observed up to an optimal temperature, which is typically around 37C 98.6F for human lactase.Beyond the optimal temperature, the rate of the reaction starts to decrease. This is because high temperatures can cause the enzyme to denature, or lose its three-dimensional structure, which is essential for its catalytic activity. Denatured enzymes are no longer able to bind to their substrates effectively or catalyze the reaction, leading to a decrease in the rate of lactose hydrolysis.In summary, the effect of temperature on the rate of lactase enzyme-catalyzed hydrolysis of lactose into glucose and galactose can be described as follows:1. As temperature increases, the reaction rate increases due to increased molecular collisions between the enzyme and substrate.2. The reaction rate reaches its maximum at the optimal temperature, which is around 37C for human lactase.3. Beyond the optimal temperature, the reaction rate decreases as the enzyme denatures and loses its catalytic activity.