Final answer:
The sigmoid colon does not use digestive enzymes to break down macromolecules; instead, its primary function is to compact waste and absorb water. Digestive enzymes like dipeptidase, sucrase, and amylase act in earlier stages of digestion, particularly in the small intestine.
Step-by-step explanation:
The enzymes used in the sigmoid colon are not primarily involved with the breakdown of macromolecules, as most of the digestive processes occur before the chyme reaches the sigmoid colon. The main digestive enzymes involved in macromolecule breakdown include dipeptidase, which targets proteins, breaking them down into amino acids; sucrase, breaking down sucrose into glucose and fructose; and amylase for the breakdown of carbohydrates into simpler sugars.
By the time digested content reaches the sigmoid colon, the majority of absorption has already taken place in the small intestine. The sigmoid colon's primary function is to compact waste into feces by absorbing water and salts, rather than further digestion of macromolecules. It doesn't secrete digestive enzymes; however, the presence of bacteria in the sigmoid colon can contribute to the breakdown of any remaining macromolecules.