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Chapter 20: Problem 46

Sketch the general structure of a triglyceride. What are the components that go into making up a typical triglyceride?

Short Answer

Expert verified
A triglyceride consists of one glycerol molecule (\( CH_{2}OH-CHOH-CH_{2}OH \)) and three fatty acid molecules (represented as \( R_{1}COOH, R_{2}COOH, R_{3}COOH \)) connected through ester bonds. The general structure of a triglyceride is \( CH_{2}OCOR_{1}-CHO{OCOR_{2}}-CH_{2}OCOR_{3} \).

Step by step solution

01

Identify the main components of a triglyceride

A triglyceride is a type of lipid and is composed of one glycerol molecule and three fatty acid molecules. These components are connected through ester bonds.
02

Draw the glycerol molecule

Sketch the glycerol molecule, which is composed of three carbon atoms (C) connected in a chain, with each carbon atom bonded to a hydroxyl group (-OH). The glycerol molecule can be represented as: \( CH_{2}OH-CHOH-CH_{2}OH \)
03

Draw the fatty acid molecules

Fatty acids are long chains of carbon and hydrogen atoms with a carboxyl group (COOH) at one end. Sketch and label three fatty acid molecules with varying chain lengths. For simplicity, we will represent them as: Fatty acid 1: \( R_{1}COOH \) Fatty acid 2: \( R_{2}COOH \) Fatty acid 3: \( R_{3}COOH \) where \(R_{1}\), \(R_{2}\), and \(R_{3}\) are the hydrocarbon chains of varying lengths.
04

Connect the glycerol and fatty acids through ester bonds

An ester bond is formed by the reaction between a hydroxyl group (-OH) from glycerol and the carboxyl group (-COOH) from a fatty acid, with the elimination of water. Connect the glycerol backbone to the fatty acids through ester bonds and remove the water molecules from each connection. The general structure of a triglyceride is: \( CH_{2}OCOR_{1}-CHO{OCOR_{2}}-CH_{2}OCOR_{3} \)
05

Label the components of the triglyceride structure

Now, label all parts of the triglyceride structure: the glycerol molecule, the three fatty acid chains, and the ester bonds connecting them.

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