Photosynthesis energy stored

The electron transport chain process of photoreactions I and II is noncyclic photophosphorylation. Cyclic photophosphorylation, which may proceed in the case of oxygen deficiency and can be considered as a shortcircuiting of electron transport, presumably does not play a role in the normal photosynthesis energy storing of the cells. 

The food a person eats is a personal energy store hanking on photosynthesis. In photosynthesis, gaseous carbon dioxide, liquid water, and solar energy interact to produce solid carbohydrates, such as sugar and starch, and gaseous ox gen. 

The inverted region was initially predicted by Marcus and the decrease in the electron transfer rate constant with —AG° has been observed experimentally many times.18 This is an important and remarkable result both for natural and artificial photosynthesis and energy conversion it predicts that, following electron transfer quenching of the excited A -B, the back electron transfer in the inverted region for the charge-separated state A + -B becomes slower as the energy stored increases. 

Chloroplasts in plant cells that are involved in photosynthesis (the chemical process that uses energy from sunlight to convert carbon dioxide and water to organic matter). Photosynthesis occurs in these bodies. Food produced by photosynthesis is stored in the chloroplasts in the form of starch grains. 

Woody plants, coal, petroleum, and natural gas provide a vast resource of energy that originally came from the sun. By the process of photosynthesis, plants store energy that can be claimed by burning the plants themselves or the decay products that have been converted to fossil fuels. Although the United States currently depends heavily on petroleum for energy, this dependency is a relatively recent phenomenon, as shown in Fig. 9.13. In this section we discuss some sources of energy and their effects on the environment. 

All free energy used by biological systems originates from solar energy stored by photosynthesis in green plants, algae, or photosynthetic bacteria. The... 

Adenosine triphosphate, better known as ATP, is able to store energy for cellular processes. When ATP reacts, the energy stored in its bonds is used to drive various processes such as the transport of materials in the cell, the synthesis of compounds needed by the cell, and, in animals, muscular contraction. To generate enough ATP to do all this work, however, there have to be other ATP-generating mechanisms, which begin with the dark phase of photosynthesis. 

We conclude this chapter with a brief introduction to photosynthesis, the natural process through which light energy from the sun is harvested by plants. Energy stored in plants is converted to other forms by combustion, which is one contributor to the changes induced in the atmosphere through industrialization. 

In all ecosystems, the oxidation of organic material by organisms during respiration releases the energy stored by photosynthesis. Writing the respiration reaction so that the stoichiometry reflects the transfer of 1 mol of electrons gives... 

The oak tree absorbs energy from the sun and stores It In the molecules it makes during photosynthesis. The stored energy allows it to carry out essential functions. ... 

Ammonium is held to be preferred by most algae as a source of nitrogen the uptake of nitrate must be followed by its reduction to ammonium and requires both supply of protons (from photosynthesis or stored energy) and additional iron (Flynn Hipkin, 1999). In some algae, nitrate uptake is completely... 

Respiration (oxidation) in plants and animals and oxidation in soils complete the photosynthetic cycle by utilizing the energy stored in the carbohydrates and organic compounds derived from the carbohydrates, by disposing of organic wastes, and by producing the C02 needed for more photosynthesis by the reaction ... 

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