Triacylglycerol is primarily stored in which tissue?

• A. Liver
• B. Muscle
• C. Blood
• D. Adipose tissue

Answer: (D)

Triacylglycerol serves as the body's main long-term energy reserve, and the tissue specialized for storing large amounts of it is adipose tissue. Adipocytes are packed with lipid droplets that contain triglycerides, enabling vast energy storage that can be mobilized when needed. The liver does store triglycerides, but mainly for processing and export as VLDL rather than as a primary storage depot. Muscle contains smaller stores of triglycerides used for immediate energy during activity. In the bloodstream, triglycerides are carried by lipoproteins, not stored. So the primary storage site for triacylglycerol is adipose tissue.