An amphipathic molecule will react in what manner when exposed to water?

An amphipathic molecule possesses both hydrophobic (water-repelling) and hydrophilic (water-attracting) regions. When such a molecule is introduced to water, the hydrophobic portions tend to avoid contact with water, while the hydrophilic portions interact favorably with it.

This unique property leads to the formation of micelles, which are aggregates where the hydrophobic tails of the molecules orient inward, away from the water, while the hydrophilic heads face outward, interacting with the surrounding water. This behavior is critical in biological systems, as it helps in the formation of cell membranes and the encapsulation of hydrophobic substances in a hydrophilic environment.

Therefore, the correct response highlights the amphipathic molecule's ability to organize itself into structures that minimize energy interactions with water, facilitating the formation of micelles.