Photosynthesis involves the use of energy from sunlight, water and carbon dioxide to produce glucose and oxygen. Cellular respiration uses glucose and oxygen to produce carbon dioxide and water. The main difference between photosynthesis and cellular respiration is, photosynthesis is an anabolic process, where the synthesis of organic compounds occurs, and storing energy. In contrast, cellular respiration is a catabolic process, where the stored organic compounds are utilized, and producing energy. Photosynthesis occurs in the chloroplasts, whereas cellular respiration occurs in the mitochondria.
In contrast, cellular respiration is a catabolic process, where the stored organic compounds are utilized, and producing energy. The primary purpose of photosynthesis is to convert radiant energy from the sun into chemical energy that can be used for food. Cellular respiration is the process that occurs in the mitochondria of organisms (animals and plants) to break down sugar in the presence of oxygen to release energy in the form of ATP.