1. Temperature: Enzymes have an optimal temperature range where they function best.
* Low temperatures: Slow down enzyme activity, as molecules move slower and have fewer collisions.
* High temperatures: Can denature the enzyme, changing its shape and rendering it inactive.
2. pH: Each enzyme has an optimal pH at which it works best.
* Extreme pH: Can disrupt the enzyme's shape and disrupt its ability to bind to its substrate.
3. Substrate Concentration: The rate of an enzyme-catalyzed reaction increases as the substrate concentration increases, until a point where the enzyme is saturated with substrate.
* Low substrate concentration: The enzyme is not working at full capacity.
* High substrate concentration: All active sites on the enzyme are occupied, and the reaction rate plateaus.
4. Enzyme Concentration: The more enzyme present, the faster the reaction rate, as long as there is enough substrate available.
* Low enzyme concentration: Fewer enzyme molecules are available to catalyze the reaction.
* High enzyme concentration: More enzyme molecules are available, leading to faster reaction rates.
Other factors that can affect enzyme activity include:
* Activators: Substances that increase enzyme activity.
* Inhibitors: Substances that decrease enzyme activity.
* Coenzymes: Non-protein molecules that assist enzymes in their function.
* Cofactors: Inorganic ions that help enzymes function.
