Here's why:

* Metabolic pathways are a series of interconnected chemical reactions that occur within a cell. These reactions are crucial for life, allowing cells to produce energy, build and break down molecules, and carry out other essential functions.

* Enzymes are biological catalysts. This means they speed up chemical reactions without being consumed in the process. They do this by lowering the activation energy of the reaction, which is the energy required to start the reaction.

* Enzymes are highly specific, meaning they typically catalyze only one or a small number of reactions. Each step in a metabolic pathway is usually catalyzed by a specific enzyme.

Therefore, enzymes play a crucial role in metabolic pathways by facilitating the chemical reactions necessary for life.