The function of a biological macromolecule depends on what other elements it contains. Which of these biological macromolecule is rich in carbon-hydrogen bonds and functions as a long-term energy storage?

Lipids are the biological molecules which are used as long-term energy storage. Lipids can be described as biological molecules that are not soluble in water but are soluble in non-polar solvents.

Triglycerides are a type of lipids which are present in the adipose tissue. These molecules serve as major long - term energy storage molecules both in plants as well as in animals.

Carbohydrates serve as quickest energy molecules whereas lipids serve as molecules which can store energy for longer periods.