Which type of fatty acids are typically solid at room temperature?

Compare with other types of fatty acids: Monounsaturated fatty acids have one double bond, which introduces a kink in the chain, preventing tight packing and lowering the melting point. Polyunsaturated fatty acids have multiple double bonds, further reducing their ability to pack tightly and lowering their melting point. Trans fatty acids, despite having double bonds, are structurally straighter than cis fatty acids, making them more solid-like but not as solid as saturated fatty acids.

Relate the physical state to room temperature: Saturated fatty acids, due to their tight packing and high melting points, are typically solid at room temperature. In contrast, monounsaturated and polyunsaturated fatty acids are usually liquid at room temperature.