Most transmembrane proteins have ________ regions facing the intra- and extracellular fluid, and ________ regions embedded in the phospholipid bilayer.
A. hydrophilic; hydrophilic
B. hydrophobic; hydrophilic
C. hydrophilic; hydrophobic
D. hydrophobic; hydrophobic
E. lipophilic; lipophobic
Answer: C
Anatomy & Physiology
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