Can proteins break down fats?

Proteins themselves do not break down fats. The correct understanding lies in the distinction between different types of biomolecules and their specific functions in metabolic processes. Proteins, in the context of enzymes, primarily facilitate the breakdown of proteins (as proteases) or carbohydrates (as amylases). Fats, on the other hand, are broken down by specific enzymes known as lipases.

Lipases are enzymes specifically designed to cleave the bonds in fats and are primarily produced in the pancreas and secreted into the small intestine. This is where the bulk of fat digestion occurs, supported by bile salts that emulsify fats, making them more accessible for enzymatic action.

Therefore, the assertion that proteins can break down fats is incorrect, as the metabolic roles of these molecules are distinct, and specific enzymes are required for different types of macromolecules.