Chapter 23, Problem 66A

Interpretation Introduction

Interpretation:

The structures of a triglyceride and a phospholipid should be compared and contrast.

Concept introduction:

The molecules which contains hydrocarbons and not soluble in water but soluble in nonpolar solvents is known as lipid.

Lipids are classified as:

Triglycerides, Phospholipids and, Steroids and Waxes

Explanation of Solution

The type of lipid found in our blood is known as triglycerides, whereas the type of lipid which is the main component of cell membrane is known as phospholipid.

Phospholipid consists of two fatty acids and a phosphate group whereas triglyceride is obtained by the three glycerol molecules and three fatty acids.

In the structure of Phospholipid, two fatty acids and a phosphate group linked with each other by ester bonds.

In structure of triglyceride, three glycerol molecules and three fatty acids linked with each other by ester bonds.

Structure of triglyceride is:

Where, R^’ = alkyl group.