Chapter 8, Problem 8.47EP

(a)

Interpretation Introduction

Interpretation: The number of omega-3 fatty acid residues in the given triacylglycerol molecules have to be predicted.

Concept introduction: Triacylglycerol is produced by the reaction of one molecule of glycerol and three molecules of fatty acid.  An unsaturated fatty acid in which the endmost double bond is three carbon atoms away from the methyl end is known as the Omega-3 fatty acids.

(b)

Interpretation Introduction

Interpretation: The number of omega-6 fatty acid residues in the given triacylglycerol molecules have to be predicted.

Concept introduction: Triacylglycerol is produced by the reaction of one molecule of glycerol and three molecules of fatty acid.  An unsaturated fatty acid in which the endmost double bond is six carbon atoms away from the methyl end is known as the Omega-6 fatty acids.

(c)

Interpretation Introduction

Interpretation: The number of “Good” fatty acid residues in the given triacylglycerol molecules have to be predicted.

Concept introduction: In a dietary context, there are two different types of fats: good fat and bad fat.  Different types of fats have different effects.  Saturated fats are known as “bad fat” and monounsaturated fats are called “good fat”.  Polyunsaturated fats can be both “good fat” and “bad fat”.

(d)

Interpretation Introduction

Interpretation: The number of ${\Delta }^9$ fatty acid residues in the given triacylglycerol molecules have to be predicted.

Concept introduction: Monounsaturated fatty acids generally contain ${\Delta }^9$ fatty acid residues in which the double bond is present between 9^th and 10^th carbon atom from the carboxyl end.