Cellular Respiration: Photosynthesis: Occurs in all living organisms. High H+ concentration in the thylakoid lumen. Occurs in all living organisms (plants and animals). They work well since living organisms supply plants with carbon dioxide which undergoes photosynthesis and produces glucose and these plants and bacteria give out oxygen which all living organisms need for respiration. In photosynthesis light dependent reactions, ultra violet light strikes chlorophyll pigments which excites electrons leading to separation of oxygen molecules from carbon dioxide. Biologydictionary.net Editors. Respiration is the set of metabolic reactions that take in cells of living organisms that convert nutrients like sugar into ATP (adenosine tri phosphate) and waste products. Acetyl CoA is also able to transfer into the mitochondria, where the Krebs cycle and oxidative phosphorylation will take place. Likewise, there are many less carnivores than there are herbivores, because they must feed on many smaller organisms throughout their life to grow and reproduce. Hence in photosynthesis you have the light dependent reactions and the dark reactions while in respiration there is aerobic respiration and anaerobic respiration. However, there is a large body of evidence which points to the fact that all life has a common ancestor. Others are able to photosynthesize, like primitive single-celled plants. In photosynthesis light dependent reactions, ultra violet light strikes chlorophyll pigments which excites electrons leading to separation of oxygen molecules from carbon dioxide. Photosynthesis requires the products of respiration, while respiration requires the products of photosynthesis. This DNA is replicated separately from the main DNA found within the nucleus. Processes in photosynthesis are divided on basis of requirement of sunlight while respiration processes are divided on basis of requirement of oxygen. Web. Lodish, H., Berk, A., Kaiser, C. A., Krieger, M., Scott, M. P., Bretscher, A., . 3. Releases energy in a step wise manner as ATP molecules. Production of ATP via oxidation of organic sugar compounds. Cellular respiration takes place in the mitochondria of cells. Diffen LLC, n.d. Photosynthesis takes place in the chloroplasts and organelles of a plant cell. One step above plants and algae, herbivores exploit the bounty that plants produce. The chloroplast uses the energy harnessed from these photons and their interaction with the cytochromes and other proteins to drive the formation of glucose. The relationship between photosynthesis and cellular respiration is such that the products of one system are the reactants of the other. Photosynthesis is the main process which drives life on Earth. Animals, and indeed the entire food-chain, relies on the glucose produced by plants. This electron transport chain uses a series of electron driven enzymes, which specialize in binding loose phosphate groups to ADP. This theory is backed by the evidence that both chloroplasts and mitochondria are surrounded in double membranes, a supposed remnant of the ancestral engulfing process. Besides the organisms that rely on sulfur near hydrothermal vents, the majority of life on Earth relies on the sugar glucose. Glycolysis happens within the cytosol of the cell, outside of the mitochondria. At the top of the diagram, light and water combine in the chloroplasts, where the hydrogens are separated from the oxygen in chain of proteins starting from the energy-collecting cytochromes and accessory pigments. Photosynthesis and cellular respiration are complementary biochemical reactions. Edit or create new comparisons in your area of expertise. Ecology is also the study of how various organisms interact with each other while carrying out these reactions. For instance, ATP is used to pump ions out of cells, creating the electrical potential needed for nervous reactions. “Glyco-” refers to glucose, where “-lysis” refers to something being divided or split in half. Oxygen is absorbed and carbon dioxide is released. Oxygen is produced as a by-product. Which of the following things would be MOST devastating to an ecosystem? Carbon dioxide and water combine in presence of sunlight to produce glucose and oxygen. Photosynthesis occurs in the leaves and green parts of plants. Two of these molecules are then combined to produce a glucose, among other things. Glucose and oxygen are the reactants of this process. In doing so, they become the main products of the light reactions, NADPH and ATP. While chloroplasts are only found in plants, mitochondria are found in all living eukaryotes. The entire process occurs in Mitochondria. While in photosynthesis carbon dioxide and water yield glucose and oxygen, through the respiration process glucose and oxygen yield carbon dioxide and water. The Calvin Cycle has three phases, carbon fixation, reduction, and regeneration of ribose. Biologydictionary.net Editors. . 2 stages: The light dependent reaction, light independent reaction. Photosynthesis is a process in photoautotrophs that converts carbon dioxide into organic compounds in the presence of sunlight. Some would harness sunlight, while others would feed upon those.