What special proteins that break large molecules of nutrient into small molecules?

The special proteins that break large molecules of nutrients into smaller molecules are called enzymes. These enzymes facilitate biochemical reactions by lowering the activation energy required for the breakdown of macromolecules such as carbohydrates, proteins, and fats into their smaller, absorbable units like sugars, amino acids, and fatty acids. Each enzyme is specific to a particular substrate, enabling efficient digestion and metabolism in living organisms.