* Energy Storage: Fats and oils (types of lipids) are highly efficient at storing energy. They contain a high amount of energy per gram compared to carbohydrates or proteins.
* Structure: Lipids form the structural basis of cell membranes (phospholipids). They also contribute to the structure of some tissues, like the myelin sheath that insulates nerve cells.
Let's look at the other options:
* Carbohydrates: Primarily used for short-term energy storage (e.g., glycogen in animals) and structural components of cell walls in plants (e.g., cellulose).
* Proteins: Primarily involved in various functions like catalysis (enzymes), transport, and structural support (e.g., collagen).
* Nucleic Acids: Store and transmit genetic information (DNA and RNA).
