Which of the following is the end product of the digestion of oil

Step 1: Analyze the question The question asks for the end product of digesting oil. Oils are lipids (fats in liquid form), so we need the products of lipid digestion.

Step 2: Explain the concept Oils and fats are triglycerides. Each molecule is made of one glycerol unit joined to three fatty acid chains.

Digestion happens as follows:

• Bile salts (from the liver, stored in the gallbladder) emulsify the oil, breaking it into tiny droplets so there is more surface area.
• Lipase (from the pancreas and the small intestine) then breaks down the triglycerides.

Equation: Oil (fat) + water → fatty acids + glycerol (catalysed by lipase)

Step 3: Check each option

• A. Glucose: the end product of carbohydrate digestion, not of oil.
• B. Glycerol: one of the two end products of fat and oil digestion (the other is fatty acids). This is the only option that fits.
• C. Amino acid: the end product of protein digestion.
• D. Glycogen: a storage form of carbohydrate in the liver and muscles. It is not a digestion product.

Step 4: Answer The correct option is B. Glycerol. Fatty acids are the other end product, but they are not listed among the options.

Exam tip: Match each food class to its end products:

• Carbohydrates → glucose (simple sugars)
• Proteins → amino acids
• Fats and oils → fatty acids + glycerol

Whenever you see "oil" or "fat", think "fatty acids and glycerol".