E. respiration. Photosystem II is connected with photolytic oxidation of water. Each photosystem is differentiated by the wavelength of light to which it is most reactive (700 and 680 nanometers, respectively), and the type of terminal electron acceptor. a. respiration. Photosystem II is the photosystem that generates the two electrons that will eventually reduce NADP + in ferredoxin-NADP-reductase. 2. 7. PS 1 contains chlorophyll B, chlorophyll A-670, Chlorophyll A-680, chlorophyll A-695, chlorophyll A-700 and carotenoids. The PS II is made up of two subunits made up of D1 and D2. Treatment of lamellar fragments with neutral detergents releases these particles, designated photosystem I and photosystem II, respectively. It works together with Photosystem I to absorb enough energy to the separate the oxygen of a water molecule from its e-. Chlorophyll a and chlorophyll b are approximately equal. Photosystem II is present in the appressed part of grana thylakoids. Photosystem II is part of the electron transport chain within a cell. To replenish the deficit of electrons, electrons are extracted from water (either through photolysis or enzymatic means) and supplied to the chlorophyll. Photosystem II is one of a system of photosystems involved in photosynthesis. Content Guidelines 2. Share Your PPT File. Later, photosystem II was discovered and found to be earlier in the electron transport chain. Share Your PDF File These electrons are utilized in electron transport chains to generate a proton gradient across the membrane as well as NADPH. In photosystem II, the electron comes from the splitting of water, which releases oxygen as a waste product. d. the carbon reactions only. Photosystem II was discovered later. The evolution of photosynthesis from primitive photosynthetic bacteria to higher plants has been driven by the need to adapt to a wide range of environmental conditions. Photosystem I or PS I and Photosystem II or PS II are the protein-mediated complex, and the main aim is to produce energy (ATP and NADPH2), which is used in Calvin cycle, the PSI uses light energy to convert NADP+ to NADPH2. While at photosystem II and I, the electrons gather energy from sunlight. Photosystem I was discovered first. Photosystem I and photosystem II are part of A. the light reactions and the carbon reactions. 6. TOS4. The initial photochemical and photophysical events of photosynthesis are mediated by photosystem II (PSII) and photosystem I (PSI). The light reaction of photosynthesis. Answer Now and help others. Photosystem II is present on the thylakoid membranes inside chloroplasts, the site of photosynthesis in green plants. Electrons are received from photolytic reaction. 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