Question

Lecithin is structurally like fat but contain

• A. Amino acid
• B. Hydrochloric acid
• C. Phosphoric acid
• D. Sugar

Hint:

Lecithin is a \textbf{phospho}lipid. The name itself tells you it contains a \textbf{phosphorus} group, which comes from phosphoric acid.

Answer 1

The Correct Option is C

Step 1: A typical fat (triglyceride) is structured with a glycerol backbone linked to three fatty acid chains.

Step 2: Lecithin, or phosphatidylcholine, is a phospholipid. Its structure includes a glycerol backbone connected to two fatty acid chains. A phosphate group (derived from phosphoric acid) and a choline molecule occupy the glycerol's third position.

Step 3: The key structural difference between lecithin (a phospholipid) and a triglyceride (fat) is the presence of the phosphate group in lecithin.