Which statement about lipids is true?

Which statement about lipids is true?

• A. They store energy and help form the cell wall.
• B. They act as the main enzymes in metabolism.
• C. They store energy and provide protection.
• D. They are the primary genetic material.

Answer: (C)

Lipids store energy and provide protection. Fats and oils hold a lot of energy in their hydrocarbon chains, making them ideal for long‑term energy reserves. They also cushion and insulate the body, helping protect organs and regulate temperature. While lipids contribute to membranes (phospholipids in the cell membrane), the core idea that accurately describes their roles is energy storage and protective functions. Enzymes involved in metabolism are proteins, not lipids, so lipids aren’t the main enzymes. They aren’t the primary genetic material either—the genetic material is DNA or RNA. And forming a cell wall isn’t a lipid function, so that statement isn’t correct.

Lipids store energy and provide protection. Fats and oils hold a lot of energy in their hydrocarbon chains, making them ideal for long‑term energy reserves. They also cushion and insulate the body, helping protect organs and regulate temperature. While lipids contribute to membranes (phospholipids in the cell membrane), the core idea that accurately describes their roles is energy storage and protective functions. Enzymes involved in metabolism are proteins, not lipids, so lipids aren’t the main enzymes. They aren’t the primary genetic material either—the genetic material is DNA or RNA. And forming a cell wall isn’t a lipid function, so that statement isn’t correct.