In the transition from rest to moderate exercise, supplies almost all of the energy. A) glycogen stored in the liver B) glycogen stored in active muscle C) free fatty acid circulating in the blood D) triacylglycerol stored in adipocytes

Glucose, also called grape sugar, blood sugar or corn sugar, is among the simplest and one of the primary naturally occurring sugars. produced naturally by plants as the primary photosynthesis product, it is heavily used by living beings as a main energy source and is necessary for cellular respiration. chemically, it is a monosaccharide carbohydrate and serves as a building block for complex sugars like starch.

C. a mature ovule of a plant.