Photosythesis And Cellular Respiration

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Also produced are high-energy, reduced compounds: NADH and FADH2.

These compounds are the means by which electrons, which hold the energy derived initially from glucose or another food compound, are transferred to the next process, called the electron transport chain.

Given that photosynthesis is the only process through which light energy is used to assemble inorganic molecules into organic molecules that can be used as a source of energy by other organisms, it's without a doubt one of the most important chemical processes on earth.

* The word autotroph comes from the Greek words "auto" and "trophe" which means "self" and "nourishment" respectively.

Photosynthesis emerged in organisms 3.5 billion years ago, has evolved complex biochemical and biophysical mechanisms, and today occurs in plants and single-celled organisms.

It is because of photosynthesis that Earth's atmosphere and seas contain oxygen.They are also necessary to the energy exchange that living things need to the process by which green plants create their own food by turning light energy into chemical energy.Basically, photosynthesis is a chemical process through which light energy is used to convert/assemble inorganic material (water and carbon dioxide) into organic molecules.Organisms capable are referred to as autotrophs/photoautotrophs and include some bacteria (Cyanobacteria), algae and all plants.David Warmflash is an astrobiologist-writer, with a passion for communicating science to the general public.He serves as lead investigator for the Living Interplanetary Flight Experiment (LIFE), a Planetary Society-sponsored project, scheduled for launch in 2011 on the Russian Space Agency's Phobos-Grunt probe.They both consume and create the same substances (water, glucose, oxygen, and carbon dioxide) but in different ways.Through these processes, plants obtain the carbon dioxide they need and living organisms obtain the oxygen they need.Cellular respiration is the biochemical breakdown of a substrate through oxidation, wherein electrons are transferred from the substrate to an "electron acceptor," which can be any of a variety of compounds, or oxygen atoms.If the substrate is a carbon- and oxygen-containing compound, such as glucose, carbon dioxide (CO Glycolysis, which takes place in the cytoplasm of a cell, breaks glucose down to pyruvate, a more "oxidized" compound.


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