Chapter 19, Problem 56P

Interpretation Introduction

(a)

Interpretation:

The structure of lechthin formed from two molecules of oleic acid needs to be drawn.

Concept Introduction:

Phospholipid is type of lipid that contains a phosphorus atom. They are mainly found in cell membrane of plants and animals. They are also called as phosphoacylglycerol as two fatty acids with phosphate group and alcoholic group are bonded to the glycerol molecule through ester linkage.

The phospholipid molecule has two ends; polar end and non-polar end. Two long hydrocarbon chains of fatty acids form the non-polar end of the molecule and hydrophobic in nature whereas the phosphate group is polar end and hydrophilic in nature. Due to this dual nature of phospholipid molecules, they form a lipid bilayer that can be effectively involved in transfer of different hydrophobic and hydrophilic molecules across the cell membrane.

Interpretation Introduction

(b)

Interpretation:

The structure of phospholipid; Phosphatidylethanolamine formed from two molecules of myristic acid needs to be drawn.

Concept Introduction:

Phospholipid is type of lipid that contains a phosphorus atom. They are mainly found in cell membrane of plants and animals. They are also called as phosphoacylglycerol as two fatty acids with phosphate group and alcoholic group are bonded to the glycerol molecule through ester linkage.

The phospholipid molecule has two ends; polar end and non-polar end. Two long hydrocarbon chains of fatty acids form the non-polar end of the molecule and hydrophobic in nature whereas the phosphate group is polar end and hydrophilic in nature. Due to this dual nature of phospholipid molecules, they form a lipid bilayer that can effectively involves in transfer of different hydrophobic and hydrophilic molecules across the cell membrane.

Interpretation Introduction

(c)

Interpretation:

The structure of sphingomyelin formed from palmitic acid and choline needs to be drawn.

Concept Introduction:

Phospholipid is type of lipid that contains a phosphorus atom. They are mainly found in cell membrane of plants and animals. They are also called as phosphoacylglycerol as two fatty acids with phosphate group and alcoholic group are bonded to the glycerol molecule through ester linkage.

The phospholipid molecule has two ends; polar end and non-polar end. Two long hydrocarbon chains of fatty acids form the non-polar end of the molecule and hydrophobic in nature whereas the phosphate group is polar end and hydrophilic in nature. Due to this dual nature of phospholipid molecules, they form a lipid bilayer that can be effectively involved in the transfer of different hydrophobic and hydrophilic molecules across the cell membrane.