Digestion And Absorption

Bile, produced by the liver and stored in the gall bladder, contains bile pigments and bile salts but no digestive enzymes. As described in NCERT Class 11, Chapter 16 (Digestion and Absorption), bile salts break large fat globules into a fine suspension of much smaller droplets, a process called emulsification. By increasing the total surface area exposed to lipase, emulsification greatly accelerates enzymatic fat digestion even though bile itself does not cleave any chemical bonds. Hydrolysis of ester bonds is the chemical job of pancreatic and intestinal lipase, not bile, so that option confuses an enzyme function with a physical one. Conversion of fats into glucose does not occur during digestion; fats yield fatty acids and glycerol, making that choice biochemically impossible. Activation of pepsinogen into pepsin is carried out by hydrochloric acid in the acidic stomach, an entirely different organ and pH from the alkaline duodenum where bile acts. A consistency check confirms the answer: bile works in the small intestine on fats by a surface-area mechanism, exactly matching emulsification rather than any enzymatic step.