Here's why:
* Activation Energy: Chemical reactions require a certain amount of energy to get started, called activation energy. This energy is needed to break the bonds of the reactants and allow the reaction to proceed.
* Enzymes as Catalysts: Enzymes are biological catalysts that speed up reactions by lowering the activation energy. They do this by providing an alternative reaction pathway with a lower energy barrier.
* Specificity: Enzymes are highly specific, meaning they only catalyze certain reactions involving specific molecules (substrates). This specificity ensures that the right reactions occur at the right time and place in the cell.
Without enzymes, most chemical reactions in cells would happen too slowly to sustain life.
