BECE Science 2020 Paper

Concept:Fats and oils are lipids that are broken down during digestion into their simplest absorbable products.Explanation:Fats and oils are mostly present in the form of triglycerides.A triglyceride is made of one glycerol molecule attached to three fatty acid molecules.During digestion, bile salts from the liver emulsify fats into tiny droplets.Then, pancreatic lipase acts on these droplets.This enzyme hydrolyses the ester bonds present in the triglyceride.The overall chemical change is:$$\text{triglyceride} + 3\mathrm{H_2O} \xrightarrow{\text{lipase}} 3\,\text{fatty acids} + \text{glycerol}$$Hence, the end-products of fat and oil digestion are fatty acids and glycerol.Amino acids are the end-products of protein digestion.Glucose and maltose are end-products of carbohydrate digestion.Therefore, only option D correctly names the end-products of fats and oils.Answer:D. fatty acid and glycerol