Here's why:

* Catalysts: Enzymes are biological catalysts, meaning they speed up chemical reactions without being consumed in the process.

* Lowering Activation Energy: Enzymes achieve this by lowering the activation energy required for the reaction to occur. Activation energy is the minimum amount of energy needed for a reaction to start.

* Specificity: Enzymes are highly specific, meaning they usually only catalyze one or a small group of related reactions. This specificity is due to the shape of the enzyme and its active site.

Let me know if you'd like to know more about how enzymes work!