Question

once inside a cell, fatty acids and glycerol are recombined into a triglyceride then stored in fat tissue until they are needed for energy.
stearin, a triglyceride
select the true statements.
triglycerides travel across cell membranes.
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.

Explanation:

1. For "Triglycerides travel across cell membranes": Triglycerides are large and non - polar, but they are broken down into smaller molecules (fatty acids and glycerol) to cross cell membranes, so this statement is false.
2. For "Triglycerides are stored until they are needed for energy": The text says "then stored in fat tissue until they are needed for energy", so this statement is true.
3. For "Triglycerides from food are broken down in the stomach": Triglycerides are mainly broken down in the small intestine, not the stomach, so this statement is false.
4. For "In cells, fatty acid and glycerol molecules are combined to make triglycerides": The text states "Once inside a cell, fatty acids and glycerol are recombined into a triglyceride", so this statement is true.

Answer:

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