LIFE SCIENCE

Detailed explanation-1: -Within the body, lipids function as an energy reserve, regulate hormones, transmit nerve impulses, cushion vital organs, and transport fat-soluble nutrients. Fat in food serves as an energy source with high caloric density, adds texture and taste, and contributes to satiety.

Detailed explanation-2: -Fats are used to store energy within their chemical bonds. They also serve as insulation in organisms that maintain a constant body temperature, such as mammals and birds. The building blocks of fats are triacylglycerol molecules. These molecules are composed of one glycerol and three fatty acids.

Detailed explanation-3: -Among all the classes of biological molecules, lipids have the lowest thermal conductance and highest insulation potential. This property can be exploited by mammals to reduce heat loss, suppress brown adipose tissue activation, reduce the activation of thermogenic programs, and increase metabolic efficiency.