Which of the Following Describes an Amphipathic Molecule

Question

Which of the following describes an amphipathic molecule?
A) A phospholipid with two polar ends
B) A phospholipid with two hydrophobic ends
C) A steroid with a hydrophilic functional group
D) A steroid with a hydrophobic functional group
E) A phospholipid with both a hydrophobic end and a hydrophilic end

Accepted Answer

Amphipathic molecules have both hydrophobic (water-repelling) and hydrophilic (water-attracting) parts. Phospholipids, with their hydrophobic fatty acid tails and hydrophilic phosphate head groups, are classic examples of amphipathic molecules.