Types of Lipids - MCAT Biological and Biochemical Foundations of Living Systems

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Question

Which of the following is not a lipid?

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Answer

Lipids are hydrophobic molecules that have low solubility in water and high solubility in nonpolar organic solvents. The following choices all describe lipid molecules, with the exception of glycine. Glycine is an amino acid and contains a carboxyl group (like fatty acid lipids), but also a amine group. These function groups make glycine hydrophilic and polar, unlike lipids.

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