Final answer:
Saturated fats do not contain double bonds; they have tightly packed carbon chains with single bonds, are solid at room temperature, and are mainly found in animal sources.
Step-by-step explanation:
The characteristic that is NOT a feature of saturated fats is that they contain at least one double bond (D). Saturated fats have all carbon atoms in their fatty acid chains bonded to as many hydrogen atoms as possible. This absence of double bonds allows them to pack tightly together and be solid at room temperature, which are indeed characteristics of saturated fats. Saturated fats are typically found in animal products and are used as a form of stored energy. However, the presence of double bonds is a characteristic of unsaturated fats, which can contribute to them being liquid at room temperature.
Saturated fats have a number of characteristics, but one of the characteristics that is NOT associated with saturated fats is that they contain at least one double bond. Saturated fats are composed of fatty acids with single bonds within the carbon chain, which allows the molecules to form straight chains that can be packed together tightly. This characteristic makes saturated fats usually solid at room temperature. Saturated fats are a form of stored energy and are primarily found in animals.