Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Problem:Passage: Triglycerides are the main form of stored energy in animals. This type of lipid is commonly called fat. Triglycerides are composed of a glycerol and three fatty acid chains. An example is shown in Figure below . In humans, triglycerides are a mechanism for storing unused calories, and their high concentration in blood correlates with the consumption of excess starches and other carbohydrate-rich foods. Answer: triglycerides
Solution:
What stored form of energy is made up of glycerol and three fatty acid chains?