They are similar because they both have a waste product. The inputs in the photosynthesis are water and carbon dioxide while inputs in the case of cellular respiration are oxygen and glucose. Cellular Respiration: This process converts the food created by photosynthesis into energy which is then utilized by living organisms and plants. They are different in that photosynthesis assembles the glucose molecule, while cellular respiration takes it apart. Secondly, both biological processes are electron carriers, involve an electron transport chain (ETC), and are reduction-oxidation reactions. Photosynthesis takes place in the chloroplasts, but cellular respiration doesn’t only happen in plants but in animals as well. 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. Photosynthesis and respiration both involve cycles of reactions, involving redox reactions. Through these processes, plants obtain the carbon dioxide they need and living organisms obtain the oxygen … Photosynthesis is the process whereby carbon dioxide and water react, using energy from sunlight, to produce glucose and oxygen. Compare and contrast the major pathways of photosynthesis and respiration. Photosynthesis and cellular respiration are complementary biochemical reactions. Explanation: The relationship between photosynthesis and cellular respiration is such that the products of one process are the reactants of the other. This process creates energy (ATP) by using glucose. Both photosynthesis and respiration involve the conversion of energy from one form to another through a series of biochemical reactions. Similarities Between Photosynthesis And Cellular Respiration. They both consume and create the same substances (water, glucose, oxygen, and carbon dioxide) but in different ways. All living organisms experience cellular respiration. Photosynthesis requires the products of respiration, while respiration requires the products of photosynthesis. Photosynthesis occurs in the presence of light while cellular respiration is a continuous activity that likes to happen all the time. Photosynthesis releases oxygen into the atmosphere, and cellular respiration uses that oxygen to release energy from food. Photosynthesis vs. Cellular respiration - - Photosynthesis and cellular respiration are complementary processes by which living things obtain needed substances. The two processes are similar in that they both produce energy, albeit in two different forms. 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. 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