Macromolecules of Life Practice Test 2025 – Complete Exam Prep

Question: 1 / 400

What type of bond primarily holds together fatty acids in lipids?

Ionic bonds

Covalent bonds

Fatty acids in lipids are primarily held together by covalent bonds. Specifically, the bonds formed between the carboxyl group of a fatty acid and the hydroxyl group of glycerol in triglycerides are ester bonds, which are a type of covalent bond. These covalent interactions create a stable structure that contributes to the overall integrity of lipid molecules, such as fats and oils.

When fatty acids combine with glycerol to form lipids, they undergo dehydration synthesis, a process where water is removed, and covalent bonds are formed. This strong bonding is essential for energy storage and maintaining the structural integrity of cell membranes, highlighting the importance of covalent bonds in lipid chemistry.

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Hydrogen bonds

Van der Waals forces

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