Step-by-step explanation:
The phospholipid bilayer stabilizes the membrane structure, however, the chemical composition of the phospholipids makes the cell membrane flexible, not rigid. In fact, the fatty acids of the phospholipids make the hydrophobic interior of the membrane fluid. This fluidity allows some molecules to move laterally within the plane of the membrane.
An interesting fact is that the amount of cholesterol in the membranes, together with the degree of saturation of the fatty acids of the phospholipids, can increase or decrease the fluidity of the membrane. In fact, shorter fatty acid chains make the membrane more fluid, as do unsaturated fatty acids.
We can conclude that the correct answer is:
Answer:
The phospholipid bilayer stabilizes the membrane structure and the chemical composition of these phospholipids makes the cell membrane flexible. That is possible because the fatty acids of the phospholipids make the hydrophobic interior of the membrane fluid. This fluidity allows some molecules to move laterally within the plane of the membrane. Shorter fatty acid chains make the membrane more fluid, as do unsaturated fatty acids.