Question

Lecithin, a small molecular weight organic compound in living tissues, is an example of:

• A. Amino acids
• B. Phospholipids
• C. Glycerides
• D. Carbohydrates

Answer 1

The Correct Option is B

Lecithin, a small molecular weight organic compound in living tissues, is an example of:

Option 2: Phospholipids

Explanation:

Lecithin is a type of phospholipid, which are lipids containing a phosphate group. Specifically, lecithin is a group of yellow-brownish fatty substances occurring in animal and plant tissues, and in egg yolk, composed of phosphoric acid, choline, fatty acids, glycerol, glycolipids, triglycerides, and phospholipids.

Let's look at why the other options are incorrect:

• Amino acids: Amino acids are the building blocks of proteins, not lipids.
• Glycerides: Glycerides are lipids consisting of glycerol combined with fatty acids. While lecithin contains glycerol and fatty acids, it also contains a phosphate group and choline, making it a phospholipid.
• Carbohydrates: Carbohydrates are sugars, starches, and fibers, which are different from lipids like lecithin.