Which type of lipid helps the body absorb fat-soluble vitamins and is a major component of cell membranes and nerve cells?

• A. Fats
• B. Proteins
• C. Carbohydrates
• D. Nucleic acids

Answer: (A)

Lipids provide essential functions in energy storage, membrane structure, and vitamin absorption. The type of lipid described is fats. Fats aid the absorption of fat-soluble vitamins A, D, E, and K because these vitamins dissolve in lipids and are carried to intestinal cells within lipid-containing micelles formed during digestion. At the same time, lipids are key components of cell membranes—the phospholipid bilayer—and nerves rely on lipid-rich membranes for proper insulation and signaling. Because this description highlights both vitamin absorption and membrane/nerve involvement, fats best fit the concept.