During which process is energy stored in glucose?

The process during which energy is stored in glucose is photosynthesis. During this vital biological process, plants, algae, and some bacteria convert light energy, typically from the sun, into chemical energy in the form of glucose. This occurs primarily in the chloroplasts of plant cells, where chlorophyll absorbs sunlight.

In photosynthesis, carbon dioxide and water are combined using the energy from sunlight to produce glucose and oxygen. The energy captured in this glucose molecule is stored and can be later used by the plant for growth, development, and as a source of energy for cellular processes. This process underscores the fundamental role of photosynthesis in the global energy cycle, as it transforms solar energy into a chemical form that can be utilized by a wide array of organisms.

While respiration and fermentation also involve energy transformation processes, they do not result in the storage of energy in glucose; instead, they involve the breakdown of glucose to release energy for cellular functions. Therefore, photosynthesis is uniquely identified as the process where energy is initially stored in glucose.