micelle water 0000000 balayer 0000000 Figure 10-3. a lipid micelle and a lipid bilayer seen in cross-section. Lipid molecules form such structures spontaneously in water. The shape of the lipid molecule determines which of these structures is formed Wedge-Shaped lipid molecules(above) form micelles, whereas cylinder shaped phospholipid molecules(below) form bilayersFigure 10-3. A lipid micelle and a lipid bilayer seen in cross-section. Lipid molecules form such structures spontaneously in water. The shape of the lipid molecule determines which of these structures is formed. Wedge-shaped lipid molecules (above) form micelles, whereas cylinder￾shaped phospholipid molecules (below) form bilayers