Question

Select the true statements.
Triglycerides have mostly carbon and hydrogen atoms.
Fats contain nitrogen atoms.
Triglycerides have carbon atoms arranged in rings.

Answer 1

True: Triglycerides have mostly carbon and hydrogen atoms.
- Triglycerides = glycerol + three fatty acid chains, which are long hydrocarbon (C–H) chains with some oxygens in the carboxyl groups.

False: Fats contain nitrogen atoms.
- Ordinary fats (triglycerides) do not contain nitrogen. (Some other lipids—e.g., sphingolipids—do contain nitrogen, but typical dietary fats do not.)

False: Triglycerides have carbon atoms arranged in rings.
- Triglycerides are built from a glycerol backbone and straight/unsaturated hydrocarbon chains, not ring structures. (Sterols like cholesterol have rings, but they are a different lipid class.)