It is the way in which virtually all energy in the biosphere becomes available to living things. The reactive ~TildeLink() species include hydrogen peroxide (H2O2) and superoxide anion. CallUrl('www>genscript>combiocab>orghtml',0), peroxisomes - small membrane -bounded organelle that uses molecular ~TildeLink() to oxidize organic molecules.phospholipid - the major category of lipid molecules used to construct biological membranes. Paralogs usually have evolved different, although related, functions. In addition to PO2, other environmental factors and diseases can affect ~TildeLink() carrying capacity and delivery. CallUrl('umanitoba>cahtml',0), ~TildeLink() Deprivation. A situation that commonly arises in natural habitats when the biological demand for ~TildeLink() exceeds the supply, for example in sediments or when a site is organically polluted. See Nitroblue Tetrazolium (above). CallUrl('groups>molbiosci>northwestern>eduhtml',0), Term describing the cell toxic effects caused by light and fluorescent proteins, thought to be due to the formation of ~TildeLink() radicals from the non-radiative energy transfer. Oxygen cycle, along with the carbon cycle and nitrogen cycle plays an essential role in the existence of life on the earth. Everything you always wanted to know. Delivered to your inbox! As primary producers, photosynthetic organisms form the base of Earth’s food webs and are consumed directly or indirectly by all higher life-forms. Most organisms use oxygen for respiration. These example sentences are selected automatically from various online news sources to reflect current usage of the word 'oxygen.' Total pressure is the sum of all the partial pressures of a gaseous mixture. Cellular respirationis the process of utilizing oxygen and food molecules to create energy, carbon dioxide, water, and waste products. 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