Question

What are the sub-units of lipids?

• A. Amine and Fatty acids
• B. Glycerol and Fatty acids
• C. Sucrose and fatty acids
• D. None of these

Answer 1

The correct option is B

Glycerol and Fatty acids

The correct option is B

Explanation of the correct option:

1. Lipids are esters of fatty acids and glycerol with a long chain of hydrocarbons.
2. The main component in most lipids is a fatty acid.
3. It is made up of three molecules of fatty acid and one molecule of glycerol.
4. Lipids are insoluble in water but are soluble in organic solvents like ether, acetone, chloroform, benzene, etc.
5. Example: oil, waxes, cholesterol, steroids, ergosterol, etc.

Explanation of the incorrect option:

Option A

1. Fatty amines are made up of molecules of amine and fatty acid.
2. Its main function is the production of the corresponding quaternary ammonium salts, which are used as fabric softeners and hair conditioners.
3. Example:- Behentrimonium chloride.

Option C

1. Esterification of sucrose and fatty acids produces sucrose ester.
2. Sucrose ester is a group of non-naturally occurring surfactants used in cosmetics products as emulsifier, as food additives and also as surfactants in pharmaceutical industries.
3. Example: - Sucrose distearate.

Final answer: - Glycerol and fatty acids are the sub-units of lipids.