Which type of fat serves as an animal’s major form of energy storage?

• A. Triglycerides
• B. Steroids
• C. Waxes
• D. Phospholipids

Answer: (A)

Verified step by step guidance

1. Understand the role of fats in energy storage: Fats are a type of lipid, and certain types of lipids are specialized for long-term energy storage in animals.
2. Review the structure and function of triglycerides: Triglycerides consist of a glycerol backbone attached to three fatty acid chains. These fatty acid chains store energy in their chemical bonds, which can be released during metabolism.
3. Compare triglycerides to other lipid types: Steroids, waxes, and phospholipids have distinct functions. Steroids are involved in signaling and structural roles, waxes provide waterproofing, and phospholipids are key components of cell membranes. None of these are primarily used for energy storage.
4. Identify why triglycerides are the major form of energy storage: Triglycerides are highly efficient for energy storage because they are hydrophobic, allowing them to be stored without water, and they contain dense energy-rich bonds.
5. Conclude that triglycerides are the correct answer: Based on their structure and function, triglycerides are the primary lipid used by animals for long-term energy storage.