Which statement about bile is true?

• A. it works by a chemical process
• B. it is an enzyme
• C. it works by a physical process
• D. it works by a chemical and physical process

Answer: (D)

Bile aids fat digestion through both physical emulsification and chemical solubilization. Physically, bile salts coat fat droplets and break them into smaller pieces, increasing surface area for enzymes to work. Chemically, bile salts act like detergents, helping solubilize lipids and form micelles that keep fat digestion products dispersed for absorption. Since bile isn’t an enzyme and its action involves more than one type of process, the true statement is that it works by both chemical and physical processes.