NADPH is a cofactor, used to donate electrons and a hydrogens to reactions catalyzed by some enzymes. Stroma , in botany, refers to the colorless fluid surrounding the grana within the chloroplast.
Within the stroma are grana stacks of thylakoid , and the sub-organelles or daughter cells, where photosynthesis is commenced before the chemical changes are completed in the stroma. Photosynthesis occurs in two stages. The molecule is rapidly oxidized transferring its electron to the primary acceptor.
Non-cyclic Electron Flow. Under certain conditions, the photoexcited electrons take an alternative path called cyclic electron flow, which uses photosystem I P but not photosystem II P These pigments transfer the energy of their excited electrons to a special Photosystem II chlorophyll molecule, P , that absorbs light best in the red region at nanometers.
The electrons from water flow to Photosystem II, replacing the electrons lost by P NADPH is formed on the stromal side of the thylakoid membrane, so it is released into the stroma. The main product of photosynthesis is glucose , which is the molecule that produces energy to run the processes of the cell. Oxygen is mainly a byproduct of the process of photosynthesis. Six molecules of carbon dioxide and six molecules of water are needed to produce one molecule of glucose.
Definition of photosystem. The reactions of the Calvin cycle add carbon from carbon dioxide in the atmosphere to a simple five-carbon molecule called RuBP.
The final product of the Calvin cycle is glucose. Unlike the light reactions, which take place in the thylakoid membrane, the reactions of the Calvin cycle take place in the stroma the inner space of chloroplasts.
The flow of hydrogen ions through ATP synthase is called chemiosmosis , because the ions move from an area of high to low concentration through a semi-permeable structure. The Calvin cycle , Calvin —Benson—Bassham CBB cycle , reductive pentose phosphate cycle or C3 cycle is a series of biochemical redox reactions that take place in the stroma of chloroplast in photosynthetic organisms.
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Why is p the strongest oxidizing agent? The molecule is rapidly oxidized transferring its electron to the primary acceptor. Odete Artyuhov Pundit.
Is photosystem 1 cyclic or noncyclic? Non-cyclic Electron Flow. Under certain conditions, the photoexcited electrons take an alternative path called cyclic electron flow, which uses photosystem I P but not photosystem II P Enid Flude Pundit. What is the main difference between photosystem 1 and 2? The two main multi-subunit membrane protein complexes differ in their absorbing wavelength, where the photosystem I or PS 1 absorbs the longer wavelength of light which is nm while photosystem II or PS 2 absorbs the shorter wavelength of light nm.
Bess Schiegel Pundit. What is the main role of photosystem I? Photosystem I PSI, or plastocyanin-ferredoxin oxidoreductase is the second photosystem in the photosynthetic light reactions of algae, plants, and some bacteria. Franciele Chiper Pundit. Is ATP produced in photosystem 1 or 2? The pathway of electron flow starts at photosystem II , which is homologous to the photosynthetic reaction center of R.
Vinicio Vianel Teacher. What happens in each photosystem? Each photosystem contains a reaction center and an electron acceptor. The reaction center is where the electron transfer reaction occurs. In the reaction center, an excited electron is transferred from a chlorophyll molecule to an electron acceptor. This is an oxidation-reduction reaction. Ilze Hovenjurgen Supporter. Fengyun Ploegmakers Supporter. What are the products of light dependent reactions? The movement of high energy electrons releases the free energy that is needed to produce these molecules.
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