Chapter 23, Problem 69A

Interpretation Introduction

Interpretation:

The portion of lipid bilayer membrane should be drawn along with the labeling of polar and nonpolar parts of membrane.

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.

The type of lipid found in our blood is known as triglycerides. Triglyceride is obtained by the three glycerol molecules and three fatty acids.

Explanation of Solution

A group of compounds which results in the formation of double-layered surface of all cells is known as membrane lipids. Membrane lipids are classified as: cholesterol, glycolipids and phospholipids. Lipids are amphiphilic in nature which implies that lipids consist of both polar end (soluble in water) and nonpolar end (insoluble in water). The double layer having polar ends are directed outwards and nonpolar ends are directed inwards membrane lipids, and results in the formation of lipid bilayer that separates the interior and exterior of the cell.

Thus, the structure of lipid bilayer membrane with polar heads and non-polar part is: