Photosynthesis takes place in the chloroplasts, but cellular respiration doesnât only happen in plants but in animals as well. Explanation: They are similar because they both have a waste product. Similarities Between Photosynthesis And Cellular Respiration. Photosynthesis removes carbon dioxide from the atmosphere, and cellular respiration puts it back. The inputs in the photosynthesis are water and carbon dioxide while inputs in the case of cellular respiration are oxygen and glucose. Photosynthesis and cellular respiration are complementary biochemical reactions. Photosynthesis is the process whereby carbon dioxide and water react, using energy from sunlight, to produce glucose and oxygen. Photosynthesis releases oxygen into the atmosphere, and cellular respiration uses that oxygen to release energy from food. Photosynthesis requires the products of respiration, while respiration requires the products of photosynthesis. Similarities:-In both photosynthesis and cellular respiration, hydrogen ions are pumped from an area of low hydrogen ion concentration to an area of high hydrogen ion concentration.-In both photosynthesis and cellular respiration, enzymes diffuse down their concentration gradients through ATP synthase. Photosynthesis occurs in the presence of light while cellular respiration is a continuous activity that likes to happen all the time. Through these processes, plants obtain the carbon dioxide they need and living organisms obtain the oxygen ⦠Only cellular respiration breaks down glucose into ATP or energy, photosynthesis only makes glucose which cannot be used by the plant or any organism yet. Both processes use and produce ATP in reactions that are carried out on membranes and are controlled by enzymes. Cellular Respiration: This process converts the food created by photosynthesis into energy which is then utilized by living organisms and plants. The similarities between photosynthesis and cellular respiration include both processes synthesize and use ATP, the energy currency. This process occurs within the mitochondria, organelles with the ability to break down glucose. Some differences between photosynthesis and respiration are that photosynthesis only happens in sunlight while respiration happens constantly and that photosynthesis releases oxygen while respiration uses it. All living organisms experience cellular respiration. This process creates energy (ATP) by using glucose. Photosynthesis and respiration both involve cycles of reactions, involving redox reactions. Both photosynthesis and respiration involve the conversion of energy from one form to another through a series of biochemical reactions. They both consume and create the same substances (water, glucose, oxygen, and carbon dioxide) but in different ways. The two processes are similar in that they both produce energy, albeit in two different forms. 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