what causes cyclic photophosphorylation to occur in photosynthesis
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Photosynthesis Problem Set 1 Cyclic photophosphorylation requires photosystem I, but not photosystem II. Light-dependent electron transport occurs in the thylakoid membranes, where electrons follow a cyclic pathway, returning to the photosystem I reaction center.yclic photophosphorylation requires photosystem I, but not photosystem II. Light-dependent electron transport occurs in the thylakoid membranes, where electrons follow a cyclic pathway, returning to the photosystem I reaction center.
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Section 16.3 Photosynthetic Stages and Light-Absorbing Pigments Section 16.3Photosynthetic Stages and Light-Absorbing Pigments. We now shift our attention to photosynthesis, the second main process for synthesizing ATP. In plants, photosynthesis occurs in chloroplasts, large organelles found mainly in leaf cells. The principal end products are two carbohydrates that are polymers of hexose (six-carbon) sugars: the disaccharide sucrose (see Figure 2-10) and leaf starch, a large, insoluble glucose polymer (Figure 16-33).
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Bio Unit 3 - the light reactions of photosynthesis generate high-energy electrons, which end up in___. NADP—ATP --- Oxygen; the electrons are transferred to NADP+, forming NADPH, ATP is formed via photophosphorylation, and oxygen is produced when water molecules are split.   .
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Photosynthesis in Plants These stages are known as the light-dependent reactions and light-independent reactions. Light-dependent Reactions. The first stage of photosynthesis is the light-dependent reactions. These reactions take place on the thylakoid membrane inside the chloroplast. During this stage light energy is converted to ATP (chemical energy) and NADPH (reducing power). Light-dependent Reactions.
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What is oxidative phosphorylation? Oxidative phosphorylation (or OXPHOS in short) is the metabolic pathway in which the mitochondria in cells use their structure, enzymes, and energy released by the oxidation of nutrients to reform ATP.his store of energy is tapped by allowing protons to flow back across the membrane and down this gradient, through a large enzyme called ATP synthase; this process is known as chemiosmosis. This enzyme uses this energy to generate ATP from adenosine diphosphate (ADP), in a phosphorylation reaction.
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How do the light reactions and the Calvin cycle work together to create the continuous cycle of photosynthesis Best Answer: The initial stage of the photosynthetic system is the light-dependent reaction, which converts solar energy into chemical energy. The light dependent reaction produces oxygen gas and converts ADP and NADP+ into the energy carriers ATP and NADPH.ornelius Van Niel proposed in 1931 that photosynthesis is a case of general mechanism where a photon of light is used to photodecompose a hydrogen donor and the hydrogen being used to reduce CO2[3].
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Photosynthesis Photosynthesis occurs in two stages. In the first stage, light-dependent reactions or light reactions capture the energy of light and use it to make the energy-storage molecules ATP and NADPH. During the second stage, the light-independent reactions use these products to capture and reduce carbon dioxide.arbon dioxide is converted into sugars in a process called carbon fixation. Carbon fixation is an endothermic redox reaction, so photosynthesis needs to supply both a source of energy to drive this process, and the electrons needed to convert carbon dioxide into a carbohydrate.
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Biology book1 During each Krebs cycle, eight reactions should occur. As the reactions happen, the energy currency of the cell, adenosine triphosphate, known as ATP, is made. Continue Reading. Electrons are also given off during the Krebs cycle, which fuel the process of oxidative phosphorylation. Oxidative phosphorylation is a major source of ATP and energy. The first reaction in the cycle is the addition of an acetyl group to oxaloacetate by citrate synthase.
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- For photosynthesis to occur, plants need sunlight, water, carbon dioxide and chlorophyll. Through the process of photosynthesis plants convert light energy into chemical energy. They use this energy to make food which they store as sugars. Photosynthesis occurs in the chloroplasts of the plant, usually in the leaves. The reason that the leaves look green is because of the chlorophyll. Chlorophyll absorbs the red and blue light from the sun, and this is the light the plants use for the process.
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Photosynthesis Photosynthesis is a two stage process. The Light dependent reactions, a light-dependent series of reactions which occur in the grana, and require the direct energy of light to make energy-carrier molecules that are used in the second process: light energy is trapped by chlorophyll to make ATP (photophosphorylation).hen light energy is absorbed by a chlorophyll molecule its electrons gain energy and move to higher energy levels in the molecule (photoexcitation). Sufficient energy ionises the molecule, with the electron being 'freed' leaving a positively charged chlorophyll ion. This is called photoionisation.
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Light-independent reactions Overview of the Calvin cycle and carbon fixation. 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 chloroplasts in photosynthetic organisms.hese reactions take the products (ATP and NADPH) of light-dependent reactions and perform further chemical processes on them. There are three phases to the light-independent reactions, collectively called the Calvin cycle: carbon fixation, reduction reactions, and ribulose 1,5-bisphosphate (RuBP) regeneration.
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- EXPERT ANSWER. The process of photosynthesis occurs in two phases – the light reactions and the dark reactions. Light reactions – As the name suggests, this reaction takes place in the presence of light.Light energy is absorbed by chlorophyll molecules and is utilized for splitting water molecules into hydrogen and oxygen.XPERT ANSWER. The process of photosynthesis occurs in two phases – the light reactions and the dark reactions. Light reactions – As the name suggests, this reaction takes place in the presence of light.
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Cells and Cell Processes Light and dark reactions in photosynthesis. Photosynthesis is divided into two parts: 1. Light-dependent reactions (light reactions) 2. Light-independent reactions (dark reactions). Light reactions need light to produce organic energy molecules (ATP and NADPH). They are initiated by colored pigments, mainly green colored chlorophylls. Dark reactions make use of these organic energy molecules (ATP and NADPH). This reaction cycle is also called Calvin Benison Cycle, and it occurs in the stroma. ATP provides the energy while NADPH provides the electrons required to fix the CO2(carbon dioxide) into carbohydrates.
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Overview: Photosynthesis and Photophosphorylation The basic reaction of photosynthesis is: CO 2 + H 2 2 O)n + O 2. Photophosphorylation is the process of converting energy from a light-excited electron into the pyrophosphate bond of an ADP molecule.Photophosphorylation consists of two pigments to excite, called PS1 (photosystem 1) and PS2 (photosystem 2).n Photosystem II, the pumping to H ions into the thylakoid and the conversion of ADP + P into ATP is driven by electron gradients established in the thylakoid membrane. The equation is the net result of two processes. One process involves the splitting of water.
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- Nevertheless, the Calvin cycle in most plants occurs during daylight, for only then can the fight reactions regenerate the NADPH and ATP spent in the reduction Of C02 to sugar. In essence, the chloroplast uses light energy to make sugar by coordinating the two stages of photosynthesis.
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Energy V - Photosynthesis (Calvin Cycle) Remember, reduction means that electrons are added to the molecule. NADPH, produced during the light-dependent reactions, provides the high-energy electrons for this process. ATP is also used in this anabolic reaction. Thus, the Calvin cycle is energetically tied to the light-dependent reactions of photosynthesis.
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Popular Study Materials from History 201 This culture is an example of a mound-building society. Aztec. According to the text, Benin's decision with regard to the slave trade. enabled the kingdom to maintain its political autonomy longer than its neighbors did.
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Bio 155 Ch 7 D. ATP production would decrease due to a smaller amount of H+ being available. More NADPH would be produced during the cyclic electron pathway. When an electron has been excited to a higher energy state, it can drop back... .....There is no flourescence.
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Objective The process of photosynthesis occurs when green plants use the energy of light to convert carbon dioxide (CO2) and water (H2O) into carbohydrates. Light energy is absorbed by chlorophyll, a photosynthetic pigment of the plant, while air containing carbon dioxide and oxygen enters the plant through the leaf stomata. An extremely important by-product of photosynthesis is oxygen, on which most organisms depend.
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- 21. Cyclic, rather that noncyclic, photophosphorylation occurs when the cell requires additional NADPH. 22. Because it is an anabolic process (e.g., the products contain more free energy than the reactants), photosynthesis violates the second law of thermodynamics.
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photosynthesis -light independent reaction. -occurs in stroma of chloroplast. 1.begins using RUBISCO (enzyme) to react CO₂ and RuBP (5C sugar) to form 3C sugar PGA. 2.PGA reduced using NADPH and ATP to form PGAL. -every turn of calvin cycle releases 1 PGAL and reforms RuBP with other PGAL molecules. -needs to turn 2 times to make 1 glucose molecule.
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Photophosphorylation (Cyclic and Non-cyclic) Photophosphorylation (Cyclic and Non-cyclic) Photosynthetic phosphorylation or photophosphorylation is the process of phosphate group transfer into ADP to synthesize energy rich ATP molecule making use of light as external energy source.
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Cyclic Electron Transport in Photosynthesis Cyclic Electron Transport in Photosynthesis. Photophosphorylation refers to the use of light energy to ultimately provide the energy to convert ADP to ATP, thus replenishing the universal energy currency in living things.arp points out that this cyclic photophosphorylation also takes place in isolated chloroplasts and can provide additional ATP to aid the carbohydrate synthesis taking place as result of the non-cyclic electron transport.
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Human Physiology/Print Version Nicotinamide adenine dinucleotide phosphate. NADP is used in anabolic reactions, such as fatty acid and nucleic acid synthesis, which require NADPH as a reducing agent.In chloroplasts, NADP is an oxidizing agent important in the preliminary reactions of photosynthesis.The NADPH produced by photosynthesis is then used as reducing power for the biosynthetic reactions in the Calvin cycle of photosynthesis. Powered by phpBB © phpBB Group.phpBB Mobile / SEO by Artodia.n chloroplasts, NADP is an oxidizing agent important in the preliminary reactions of photosynthesis. The NADPH produced by photosynthesis is then used as reducing power for the biosynthetic reactions in the Calvin cycle of photosynthesis. Powered by phpBB © phpBB Group. phpBB Mobile / SEO by Artodia.