Q
QuestionBiochemistry

What is a main function of lipids?
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Step 1
I'll solve this problem by explaining the key functions of lipids in biological systems.

Step 2
: Energy Storage

\text{Energy Storage Capacity: } 9 \text{ kcal/g for lipids vs. } 4 \text{ kcal/g for carbohydrates}
Lipids serve as a critical energy storage molecule in living organisms. They can store significantly more energy per gram compared to carbohydrates.

Final Answer

A main function of lipids is energy storage, providing a concentrated energy source for organisms while also serving critical structural and signaling roles in biological systems.