Texas A&M University (TAMU) BICH 410 Comprehensive Biochemistry I Exam 1 Practice Test

Hydrophobic compounds are nonpolar and do not interact favorably with water, which is a polar solvent that forms strong hydrogen-bond networks. Because there’s little to gain from mixing nonpolar molecules with water, they stay separate from water and tend to aggregate with other nonpolar molecules. This behavior is why fats and oils don’t dissolve in water and instead are soluble in nonpolar environments. So the best description is that hydrophobic compounds do not interact with water (they are non-polar). The other statements describe hydrophilic properties—interacting with water, forming hydrogen bonds, or dissolving due to charge—which don’t characterize hydrophobic substances.