Apentix/AP Biology/Unit 1: Chemistry of Life/Question
AP Biologyeasymcq1 pt

Which statement correctly distinguishes lipids from the other three major classes of biological macromolecules?

A.Lipids are grouped together by their shared hydrophobicity rather than by a repeating monomer
B.Only lipids contain carbon atoms bonded to hydrogen atoms
C.Only lipids are assembled through reactions that release water
D.Lipids are the only class used for energy storage in cells

Explanation

Core Concept

Lipids are grouped mainly by shared hydrophobic or amphipathic properties rather than by one repeating monomer. Proteins and nucleic acids are polymers, and polysaccharides are carbohydrate polymers; however, carbohydrates as a class also include monosaccharides and disaccharides. Lipids therefore differ from true biological polymers without requiring the inaccurate claim that every carbohydrate is a polymer.

Correct Answer

ALipids are grouped together by their shared hydrophobicity rather than by a repeating monomer

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