In other words, we can say that they are the similar sort of reactions occurring in reverse. During Krebs cycle, carbon dioxide is eliminated as a waste, while reducing NAD into NADH. “Energy and life” By Mikael Häggström – All images are of Public Domain license.File:Pikilia.JPG (Public Domain) via Commons Wikimedia4. Photosynthesis and cellular respiration are in many respects the “reverse” of one another. Cellular Respiration: Glycolysis, Citric acid cycle and electron transport chain are the three steps in cellular respiration. Cellular respiration occurs in light (day) as well as in the dark (night). Photosynthesis only occurs in chlorophyllous organisms. Cellular Respiration: Final electron acceptor is molecular oxygen. The first stage of cellular respiration is the glycolysis. Pigments like chlorophyll, carotenoids and phycobilins are used to trap the light energy. Some differences between photosynthesis and respiration are that photosynthesis only happens in sunlight while respiration happens constantly … Photosynthesis occurs in the leaves of plants with li… Another difference between photosynthesis and cellular respiration is that the first is an endothermic reaction, while the second is exothermic. Furthermore, respiration occurs in all living organisms but photosynthesis occurs only in plants, algae and cyanobacteria. On the other hand, in cellular respiration, oxygen and Glucose release water and carbon dioxide as by-products. Fermentation is also a kind of anaerobic respiration, which occurs when pyruvate is metabolized in the cytoplasm without oxygen. Photosynthesis: NADP is the coenzyme used in photosynthesis. 2. What is the difference between Photosynthesis and Cellular Respiration. During anaerobic respiration, the final electron acceptor is either inorganic sulfates or nitrates. In thylakoid membrane of grana, photocenters are found, organizing the photosynthetic pigments in them. Photosynthesis used two electron transport chains while cellular respiration uses one electron transport chain. Your email address will not be published. The potential energy is converted into the kinetic energy. Thereby, in anoxygenic photosynthesis, oxygen gas is not liberated as a by-product. Dark reaction is also called the Calvin cycle. 1. G-3-P is formed in both processes-In Glycolysis (cell respiration) and in Calvin cycle (photosynthesis). Photosynthesis: Energy is stored during photosynthesis. While one is a forward event that seeks to capture, the other is a backward process that seeks to release. Key Differences In photosynthesis, energy is provided by photons while in cellular respiration, energy in provided by the catabolic processes. This process is occurring during cellular respiration and photosynthesis. Photosynthesis and cellular respiration are two basic metabolic processes occurring in the energy conversion of ecosystems. U.S. National Library of Medicine, 01 Jan. 1970. Hence in photosynthesis you have the light dependent reactions and the dark reactions while in respiration there is aerobic respiration and anaerobic respiration. Photosynthetic organisms contain special pigments like chlorophyll and carotenoids in order to trap the light. The process of cellular respiration is shown in figure 4. One glucose molecule contains energy sufficient to produce 30 ATPs by oxidative phosphorylation. Energy is the basic source an individual needs for the survival of life. Cellular Respiration: Oxidative phosphorylation occurs during cellular respiration. Oxygen and carbohydrates are absorbed in the process. The second stage of photosynthesis is the dark reaction, where the NADPH and ATP produced in light reaction are used as the energy sources to synthesize glucose. 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