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Photosynthesis is a process by which plants, algae, and cyanobacteria use light energy to convert carbon dioxide and water into carbohydrates and oxygen. Learn about the different types of photosynthesis, the reactions involved, and the role of photosynthesis in the Earth's climate and life.
Photosystems are protein complexes that perform the light-dependent reactions of photosynthesis in plants, algae, and cyanobacteria. Learn about the two kinds of photosystems (PSI and PSII), their reaction centers, antenna complexes, cofactors, and roles in oxygenic photosynthesis.
Photorespiration is a process in plant metabolism that lowers the efficiency of photosynthesis by oxygenating RuBP instead of carboxylating it. Learn about the simplified photorespiration cycle, the enzymes involved, the costs and benefits, and the conditions that affect photorespiration.
Photoautotrophism is the ability of organisms to use light energy and inorganic compounds to produce organic materials. Learn about the origin, types, and examples of photoautotrophs, such as plants, algae, cyanobacteria, and anoxygenic bacteria.
Photosystem II is the first protein complex in the light-dependent reactions of oxygenic photosynthesis. It splits water molecules to produce oxygen and protons, and transfers electrons to plastoquinone and NADP+. Learn about its structure, function, cofactors, and history.
Photosynthesis converts carbon dioxide to carbohydrates via several metabolic pathways that provide energy to an organism and preferentially react with certain stable isotopes of carbon. [1] The selective enrichment of one stable isotope over another creates distinct isotopic fractionations that can be measured and correlated among oxygenic ...
Learn about the photochemical reactions involved in photosynthesis, the main process by which plants acquire energy. The article explains the role of PSII and PSI, the electron transport chain, the photophosphorylation, and the net-reaction of light-dependent reactions.
The evolution of oxygenic photosynthesis in the atmosphere amplified the productivity of the biosphere, increasing biodiversity. [7] With the presence of photosynthesis providing oxygen to the atmosphere, respiration soon evolved to provide the necessary components photosynthesis demanded to function.