Fatty acids are important for cell membrane formation because they are Choose one: O. only hydrophobic. B. only hydrophilic. C. only polar. D. amphipathic.

Fatty acids are considered amphipathic because they possess both a hydrophilic (water-attracting) head and a hydrophobic (water-repellent) tail. This unique property allows them to form bilayers, which are fundamental for the structure of cell membranes. The hydrophilic heads face outward towards the water, while the hydrophobic tails hide away from it, creating a semi-permeable barrier that is vital for cellular integrity. In real-world applications, understanding fatty acids and their amphipathic nature aids in various fields, including nutrition and pharmaceuticals. For instance, the use of fatty acids in drug delivery systems can help in the formulation of liposomes that encapsulate drugs, ensuring they efficiently reach their target areas within the body. This knowledge is crucial for developing effective therapeutic approaches and improving drug bioavailability.