Question

Select the true statements.

In cells, fatty acid and glycerol molecules are combined to make triglycerides.



Triglycerides from food are broken down in the stomach.



Triglycerides are stored until they are needed for energy.

Triglycerides travel across cell membranes.

Answer 1

True:
- In cells, fatty acid and glycerol molecules are combined to make triglycerides. (Cells esterify glycerol with three fatty acids to form triacylglycerols for storage.)
- Triglycerides are stored until they are needed for energy. (They are stored in adipose tissue as an energy reserve and mobilized when needed.)

False (or misleading):
- Triglycerides from food are broken down in the stomach. (Only a small amount is hydrolyzed by gastric lipase; most dietary triglyceride digestion occurs in the small intestine by pancreatic lipase.)
- Triglycerides travel across cell membranes. (Intact triglycerides generally do not cross membranes; fatty acids/monoglycerides cross or are released by enzymes and triglycerides are transported in lipoprotein particles or stored inside cells.)