Which of the following accurately describes starch and glycogen?

Starch and glycogen are both polysaccharides, which means they are composed of long chains of glucose molecules. Their primary function in living organisms is to serve as a form of energy storage. In plants, starch is the main storage carbohydrate, allowing them to store excess glucose produced during photosynthesis. In animals, glycogen serves a similar purpose, primarily stored in the liver and muscles, to be utilized when the body requires a quick source of glucose for energy.

Understanding that both starch and glycogen are pivotal for energy storage underscores their biological importance. While other choices might offer associations with nutrients, they do not accurately reflect the primary roles of starch and glycogen in metabolism and energy management. Thus, recognizing them as storage forms of glucose provides clear insight into their functional significance in different organisms.