Phosphorus cycle - Wikipedia The phosphorus cycle is the biogeochemical cycle that involves the movement of phosphorus through the lithosphere, hydrosphere, and biosphere Unlike many other biogeochemical cycles, the atmosphere does not play a significant role in the movement of phosphorus, because phosphorus and phosphorus-based materials do not enter the gaseous phase readily, [1] as the main source of gaseous
Biogeochemical cycle - Wikipedia A biogeochemical cycle, or more generally a cycle of matter, [1] is the movement and transformation of chemical elements and compounds between living organisms, the atmosphere, and the Earth's crust Major biogeochemical cycles include the carbon cycle, the nitrogen cycle and the water cycle In each cycle, the chemical element or molecule is transformed and cycled by living organisms and
Nutrient cycle - Wikipedia A nutrient cycle (or ecological recycling) is the movement and exchange of inorganic and organic matter back into the production of matter Energy flow is a unidirectional and noncyclic pathway, whereas the movement of mineral nutrients is cyclic Mineral cycles include the carbon cycle, sulfur cycle, nitrogen cycle, water cycle, phosphorus cycle, oxygen cycle, among others that continually
Pentose phosphate pathway - Wikipedia For most organisms, the pentose phosphate pathway takes place in the cytosol; in plants, most steps take place in plastids [4] Like glycolysis, the pentose phosphate pathway appears to have a very ancient evolutionary origin
Oxidative phosphorylation - Wikipedia Oxidative phosphorylation is made up of two closely connected components: the electron transport chain and chemiosmosis The electron transport chain in the cell is the site of oxidative phosphorylation The NADH and succinate generated in the citric acid cycle are oxidized, releasing the energy of O 2 to power the ATP synthase Carbon Catabolism pathway map for free energy including
Photophosphorylation - Wikipedia Photophosphorylation in the light-dependent reactions of photosynthesis, which occurs at the thylakoid membrane in chloroplasts and cyanobacteria In the process of photosynthesis, the phosphorylation of ADP to form ATP using the energy of sunlight is called photophosphorylation Cyclic photophosphorylation occurs in both aerobic and anaerobic conditions, driven by the main source of energy
Nitrogen assimilation - Wikipedia Nitrogen assimilation is the formation of organic nitrogen compounds like amino acids from inorganic nitrogen compounds present in the environment Organisms like plants, fungi and certain bacteria that can fix nitrogen gas (N 2) depend on the ability to assimilate nitrate or ammonia for their needs Other organisms, like animals, depend entirely on organic nitrogen from their food
Phosphorylation - Wikipedia Phosphorylation takes place in step 3, where fructose-6-phosphate is converted to fructose 1,6-bisphosphate This reaction is catalyzed by phosphofructokinase While phosphorylation is performed by ATPs during preparatory steps, phosphorylation during payoff phase is maintained by inorganic phosphate