Here's why:
* Optimum pH: Each enzyme has an optimal pH range where it functions at its peak. This is the pH where its active site is in the most suitable conformation to bind to its substrate and catalyze the reaction.
* Acidic conditions: If the pH is too low (acidic), the enzyme's structure can become distorted due to excess hydrogen ions (H+). This distortion can disrupt the active site, making it less effective or even inactivating the enzyme.
* Basic conditions: If the pH is too high (basic), the enzyme's structure can also become distorted due to a lack of hydrogen ions. This can also disrupt the active site and decrease enzyme activity.
Therefore, it's not about a specific enzyme decreasing in both acidic and basic environments. It's a general principle that applies to most enzymes. The specific pH range where an enzyme is most active varies depending on the enzyme.
Important Note: Some enzymes may be specifically adapted to function in acidic or basic environments, such as pepsin in the stomach (acidic) or alkaline phosphatase in the intestines (basic). However, even these enzymes will have a limited range of pH tolerance outside their optimal environment.
