Which of the following substances does not fall in the category of carbohydrates?

Correct option is C

Correct Answer: C. Glycerol

Explanation:

• Glycerol is a sugar alcohol, not a carbohydrate.

• It is a trihydroxy alcohol and serves as the backbone of triglycerides and phospholipids, not as an energy-providing carbohydrate.

Information Booster:

• While carbohydrates are composed of carbon, hydrogen, and oxygen in the general formula Cn(H2O)nC_n(H_2O)_nCn​(H2​O)n​, glycerol does not conform to this structure and lacks the polyhydroxy aldehyde or ketone group typical of true carbohydrates.

Additional Information:

• A. Mannose

  • A monosaccharide (simple sugar), part of carbohydrates.

• B. Starch

  • A polysaccharide, made of glucose units, classified as a carbohydrate.

• D. Cellulose

  • A complex carbohydrate (polysaccharide) found in plant cell walls.