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Oxidation of Water occurs in what process? | Yahoo …

Water oxidation is a more complex chemical reaction than proton reduction ...

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In the process of photosynthesis, water provides the electron ..

For oxidative phosphorylation the electrons come from hydrocarbon and carbohydrate structures, whereas in photosynthesis, the electrons have to be energized in the magnesium center of chlorophylls.

T1 - Sustained water oxidation by [Mn 4O 4] 7+ core complexes inspired by oxygenic photosynthesis

The oxidative chemical reactions of respiration releaseenergy, some of which is heat and some of it is captured in theform of high energy compunds such as Adenosine triphosphate (ATP)and Nicotinamide adenide dinucleotide phosphate (NADPH). Thesecompounds have a high energy (unstable) terminal phosphate bondand that terminal phosphate is easily detached with the transferof the energy to drive chemical reactions in the synthesis ofother biomolecules. In this case, the ATP loses one phosphate tobecome the energy-depleted ADP (Adenosine diphosphate)and the NADPH loses one electron to become energy-depleted NADP+.

that acts as catalyst in this oxidation of water

The oxygen evolving complex catalyzed the oxidation of water by a manganese complex as shown.

Plant photosynthesis, both the Light Phase and Dark phasereactions, takes place in chloroplasts, which may be regarded asthe "power plants" of the green leaf cells. At night,when there is no sunlight energy, ATP continues to be generatedfor the plant's needs by respiration, i.e., oxidation of(photosynthetically produced) carbohydrate in mitochondria(similar to animals).

So we can summarize by saying that the photosynthetic plantstrap solar energy to form ATP and NADPH (Light Phase) and thenuse these as the energy source to make carbohydrates and otherbiomolecules from carbon dioxide and water (Dark Phase),simultaneously releasing oxygen in to the atmosphere. Thechemoheterotrophic animals reverse this process by using theoxygen to degrade the energy-rich organic products ofphotosynthesis to CO2 and water in order to generate ATP fortheir own synthesis of biomolecules.

What's the difference between Cellular Respiration and Photosynthesis

In addition, they are sensitive to the redox potential of the chloroplast stromal compartment.

Because this process is the result of the competition of molecular oxygen and carbon dioxide for Rubisco, photorespiration reduces the overall yield of photosynthesis (light plus dark reaction).

In the future, by improving the reaction efficiency and widening the response wavelength band, we will work towards the commercialization of this ultimate, clean “ammonia photosynthesis”, which can generate ammonia from the visible light in sunlight, the nitrogen in the air, and water.

calcium ions, but the exact location and mechanism of water oxidation within the cluster is unknown ...
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    The raw materials of photosynthesis, water and carbon dioxide, enter the cells of the leaf, ..

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    Study 24 Photosynthesis #2 Oxidation of Water flashcards from Mark R. on StudyBlue.

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New catalysts in the photo-oxidation of water

I should point out that both the photo and the synthesis parts of photosynthesis aremultiple step reactions. Quite a number of steps are involved in separating hydrogen andelectrons from oxygen in water. Similarly, quite a number of step are involved in removingoxygen from carbon dioxide and incorporating hydrogen and additional electrons into thecompound. Also, the carbon dioxide is not used to create a new compound as such, butinstead, the carbon is incorporated into existing carbon-containing compounds in a waythat makes them larger than they were before.

The water-oxidation complex in photosynthesis …

Photoaututrophs utilize sunlight for energy and CO2 for theircarbon source by this process of PHOTOSYNTHESIS whereby sunlightis absorbed by a complex compound known as chlorophyll andconverted to energy which drives a series of chemical reactionsthat ultimately removes hydrogen from water or other compoundsand then combines the hydrogen with carbon dioxide in a way thatproduces sugars.

Plant cell respiration and photosynthesis

Photosynthetic organisms can be divided into two classes:those which produce oxygen and those which do not. Photosyntheticbacteria do not produce oxygen (in fact some of them calledanaerobes cannot tolerate oxygen) and this is considered a moreprimitive type of photosynthesis (in which the hydrogen donor ishydrogen sulfide, lactate or other compounds, but not water).Plants and one type of bacteria (cyanobacteria) do produceoxygen, an evolutionarily more advanced type of photosynthesis(in which the hydrogen donor is water).

Chemistry for Biologists: Photosynthesis

The photo part of photosynthesis involves the oxidation of oxygen, specifically the oxygen from the water. The photo part provides us with reducing power (in the 4H·) and energy and also oxygen for animals to breathe.

Oxidation-reduction reaction | chemical ..

In a broad chemical sense, the opposite of photosynthesis isrespiration. Most of life on this planet (all except in the deepsea vents) depends on the reciprocal photosynthesis-drivenproduction of carbon containing compounds by a series of reducing(adding electrons) chemical reactions carried out by plants andthen the opposite process of oxidative (removing electrons)chemical reactions by animals (and plants, which are capable ofboth photosynthesis and respiration) in which these carboncompounds are broken down to carbon dioxide and water.

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