What do organisms use to store energy?
Living organisms have two major ways to store energy. They use molecules such as, glycogen and triglycerides, to store energy in the form of covalent chemical bonds. Lipids also store energy in living organisms.
All living organisms need energy to survive. This energy comes from the foods that they eat. However, in order to meet the demands of energy required throughout the day the body of the organism must store its energy for use later on. Lipids and carbohydrates are the compounds used in these organisms to store energy.
Unlike organisms, viruses are not cellular, nor do they have ribosomes or any other organelles for protein production, energy generation, etc. They cannot capture or store free energy but can only use energy derived from their host. Also, viruses can only reproduce via the host and not on their own.