Final answer:
Digestive enzymes in the body break down carbohydrates and lipids by breaking covalent bonds.
Step-by-step explanation:
Digestive enzymes in the body, such as amylase, sucrase, lactase, and maltase, hydrolyze or break down carbohydrates into smaller molecules. Proteins are broken down by enzymes like pepsin, peptidase, and hydrochloric acid. Lipids are broken down by lipases. These enzymes catalyze reactions that break covalent bonds in both carbohydrates and lipids.