Question

when triglycerides are ingested, they are broken down into fatty acids and glycerol in the small intestine. these smaller molecules are able to cross the cell membrane and enter a cell. once inside a cell, fatty acids and glycerol are recombined into a triglyceride. triglycerides are then stored in fat tissue until they are needed for energy.
image of stearin, a triglyceride
select the true statements.
triglycerides are stored until they are needed for energy.
triglycerides from food are broken down in the stomach.
in cells, fatty acid and glycerol molecules are combined to make triglycerides.
triglycerides travel across cell membranes.

Explanation:

1. "Triglycerides are stored until they are needed for energy." - The passage states "Triglycerides are then stored in fat tissue until they are needed for energy." So this is true.
2. "Triglycerides from food are broken down in the stomach." - The passage says "When triglycerides are ingested, they are broken down into fatty acids and glycerol in the small intestine." So this is false (not stomach).
3. "In cells, fatty acid and glycerol molecules are combined to make triglycerides." - The passage states "Once inside a cell, fatty acids and glycerol are recombined into a triglyceride." So this is true.
4. "Triglycerides travel across cell membranes." - The passage says "These smaller molecules (fatty acids and glycerol) are able to cross the cell membrane...", not triglycerides directly. So this is false.

So the true statements are:

• Triglycerides are stored until they are needed for energy.
• In cells, fatty acid and glycerol molecules are combined to make triglycerides.

Answer:

• Triglycerides are stored until they are needed for energy.
• In cells, fatty acid and glycerol molecules are combined to make triglycerides.