First, I’ll start off with some differences between oxygenic photosynthesis and anoxygenic photosynthesis. According to PEDIAA.com, oxygenic photosynthesis occurs in algae, plants, and cyanobacteria. The final electron acceptor is water in oxygenic photosynthesis. Anoxygenic photosynthesis is used by certain bacteria, in which oxygen is not produced. It occurs in green sulfur and nonsulfur bacteria, purple bacteria, heliobacteria, and acidobacteria. In oxygenic photosynthesis, photosystems I and II are used, whereas in anoxygenic photosynthesis only photosystem I is used. Water is the electron source in oxygenic photosynthesis and hydrogen, hydrogen sulfide or ferrous ions serves as the electron donor in anoxygenic photosynthesis. As
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The energy that is absorbed by photosystem I and photosystem II raise the energy of electrons stripped from water to a high enough level that it can be used to generate a proton motive force and produce reducing power. This is why it is considered oxygenic photosynthesis because it does just that, it generates oxygen. (Anderson, D. G., et al., 2016) According to News.net, all living and breathing organisms inhale oxygen from the air to produce energy and exhale carbon dioxide into the atmosphere. In our text book, the Tandem Photosystems of Cyanobacteria and Chloroplasts, energy that is captured by antennae pigments excites a reaction center chlorophyll. This causes it to emit a high energy electron, which is passed to an electron transport chain. In cyclic photophosphorylation, electrons emitted by photosystem I are returned to that photosystem. In non-cyclic photophosphorylation, the electrons used to replenish photosystems I are donated by radiant energy, excited photosystem II. Then, photosystem II replenishes its own electrons by stripping them from water, in return, producing oxygen. (Anderson, D. G., et al., 2016) On News.net, I found in the absence of oxygenic photosynthesis, atmospheric oxygen would eventually be depleted. In a complete reaction of oxygenic photosynthesis, six carbon …show more content…
G. et al., anoxygenic photosynthetic bacteria have only a single photosystem. It cannot use water as an electron donor for reducing power. This is exactly why it is considered anoxygenic, it does not generate oxygen. Hydrogen gas, hydrogen sulfide, and organic compounds is what anoxygenic photosynthetic bacteria use as electron donors. (Anderson, D. G., et al., 2016) The way anoxygenic photosynthesize bacteria with the use of light energy is similar in the way plants use light energy. Both plants and anoxygenic photosynthesis bacteria, use carbon dioxide to create energy. But aside from having that in common they differ from how anoxygenic photosynthesis use only the use photosystem I for collecting energy from light and plants use both photosystems. (Study) According to our text book, there are two groups of anoxygenic photosynthetic bacteria. They are purple bacteria and green bacteria. The purple bacteria synthesize ATP using a photosystem similar to photosystem II in oxygenic photosynthesis of cyanobacteria and eukaryotes. Although this photosystem does not raise the electrons to an energy level that is high enough to reduce NAD+, so the cells must use an alternative mechanism to generate reducing power. They use a process called the reverse electron transport. In doing so, using ATP to run the electron transport chain in the reverse direction. Green bacteria have a photosystem that is similar to the photosystem I in oxygenic
The energy that is absorbed by photosystem I and photosystem II raise the energy of electrons stripped from water to a high enough level that it can be used to generate a proton motive force and produce reducing power. This is why it is considered oxygenic photosynthesis because it does just that, it generates oxygen. (Anderson, D. G., et al., 2016) According to News.net, all living and breathing organisms inhale oxygen from the air to produce energy and exhale carbon dioxide into the atmosphere. In our text book, the Tandem Photosystems of Cyanobacteria and Chloroplasts, energy that is captured by antennae pigments excites a reaction center chlorophyll. This causes it to emit a high energy electron, which is passed to an electron transport chain. In cyclic photophosphorylation, electrons emitted by photosystem I are returned to that photosystem. In non-cyclic photophosphorylation, the electrons used to replenish photosystems I are donated by radiant energy, excited photosystem II. Then, photosystem II replenishes its own electrons by stripping them from water, in return, producing oxygen. (Anderson, D. G., et al., 2016) On News.net, I found in the absence of oxygenic photosynthesis, atmospheric oxygen would eventually be depleted. In a complete reaction of oxygenic photosynthesis, six carbon …show more content…
G. et al., anoxygenic photosynthetic bacteria have only a single photosystem. It cannot use water as an electron donor for reducing power. This is exactly why it is considered anoxygenic, it does not generate oxygen. Hydrogen gas, hydrogen sulfide, and organic compounds is what anoxygenic photosynthetic bacteria use as electron donors. (Anderson, D. G., et al., 2016) The way anoxygenic photosynthesize bacteria with the use of light energy is similar in the way plants use light energy. Both plants and anoxygenic photosynthesis bacteria, use carbon dioxide to create energy. But aside from having that in common they differ from how anoxygenic photosynthesis use only the use photosystem I for collecting energy from light and plants use both photosystems. (Study) According to our text book, there are two groups of anoxygenic photosynthetic bacteria. They are purple bacteria and green bacteria. The purple bacteria synthesize ATP using a photosystem similar to photosystem II in oxygenic photosynthesis of cyanobacteria and eukaryotes. Although this photosystem does not raise the electrons to an energy level that is high enough to reduce NAD+, so the cells must use an alternative mechanism to generate reducing power. They use a process called the reverse electron transport. In doing so, using ATP to run the electron transport chain in the reverse direction. Green bacteria have a photosystem that is similar to the photosystem I in oxygenic