Which type of lipid primarily provides long-term energy storage for animals?

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

Answer: (C)

Verified step by step guidance

1. Understand the role of lipids in biological systems: Lipids are a diverse group of hydrophobic molecules that serve various functions, including energy storage, structural components of cell membranes, and signaling molecules.
2. Identify the types of lipids listed in the problem: Waxes, phospholipids, triglycerides, and steroids. Each of these lipids has a distinct structure and function in biological systems.
3. Recall the primary function of triglycerides: Triglycerides are composed of a glycerol backbone and three fatty acid chains. They are the main form of long-term energy storage in animals because they are energy-dense and can be stored in adipose tissue.
4. Differentiate triglycerides from other lipids: Waxes are primarily used for waterproofing and protection, phospholipids are key components of cell membranes, and steroids function as signaling molecules (e.g., hormones). These lipids do not primarily serve as long-term energy storage.
5. Conclude that triglycerides are the correct answer based on their structure and function, as they are specifically adapted for storing large amounts of energy in animals over extended periods.