What is water’s role in the light reaction of photosynthesis?

Tyr 161 is a critical amino acids that is situated proximal both to the OEC and to the source of electrons that reduce water. The figure below shows the immediate environment around Y161 and the OEC. Describe the role of the groups shown in the figure below. An expanded view of the OEC and part of the protein is shown to the right. Tyr 137 lies near the luminal interface of the protein complex. Describe the figure below and the role of the groups shown.

What is the role of oxygen in photosynthesis and ..

Each component of a chloroplast has a unique role in photosynthesis and photorespiration.

Role of Electron Transport Chain

This desire to discover new ways of producing clean energy has lead scientists at Stanford University and other universities to discover a way to harness the electricity produced during the process of photosynthesis.

Role of Water in Photosynthesis

For each electron flowing from water to NADP+ (a net change in1.14 volts), two quanta of light are absorbed, one by eachPhotosystem. Each molecule of oxygen released involves the flowof four electrons from two water molecules to two NADP+s andrequires four quanta of sunlight absorbed by each Photosystem toprovide the energy to do this. These are the "Light PhaseReactions" of photosynthesis, which produce two high energychemical products, namely NADPH and ATP.


Electron Transport in Photosynthesis

The above illustration draws from ideas in both Moore, et al. and Karp to outline the steps in the electron transport process that occurs in the thylakoid membranes of during photosynthesis. Both are utilized to to get electrons. Electron transport helps establish a proton gradient that powers production and also stores energy in the reduced coenzyme . This energy is used to power the to produce and other carbohydrates.

Thus water is the source of the electrons used in photosynthesis.

In PS I, the electrons are again excited by harnessing the energy from photons, and the reduction of NADP to NADPH2 is achieved by utilizing electrons and protons.



Stroma is the site for the dark or light-independent reactions of photosynthesis.

Photosynthesis: The Role of Light ..

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.

The light-dependent reactions ..

Significant research has been performed to assess the role of electrons in that process with a view to increasing the performance of solar cells, most of which currently operate at an efficiency around just 10%.