Unsaturated fats are typically found in what type of sources and what state at room temperature?

• A. Found in animals and are solid at room temperature
• B. Found in plants and are liquid at room temperature
• C. Found in animals and are liquid at room temperature
• D. Found in plants and are solid at room temperature

Answer: (B)

Unsaturated fats are typically found in plant sources and are liquid at room temperature. The reason is that their fatty acid chains contain one or more double bonds, which introduce kinks that prevent tight packing of molecules and lower the melting point. This is why common plant-based fats, like olive oil, canola oil, and other vegetable oils, are liquids at room temperature. In contrast, animal fats tend to be higher in saturated fats with no double bonds, allowing tight packing and a solid state when not heated. There are plant fats that are more saturated and can be solid at room temperature, such as coconut and palm oils, but overall the typical pattern is plant sources and liquid form.