what are two major reactions that take place in photosynthesis
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- The two reactions which occur during photosynthesis are light  reaction and dark reaction. Light reaction takes place only in the  presence of light. Dark reaction can occur … with or without light. 1 person found this useful.
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The Process of Photosynthesis, Its Lightand Dark Reactions The process of photosynthesis in plants consists of a complex series of biochemical reactions. It converts CO2 into carbohydrate which involves the reduction of carbon with H2O as reductant. Reduction is a chemical reaction that results in the gain of electrons, or gain of hydrogen, or loss of oxygen.
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- The light reactions are the steps of photosynthesis that convert solar energy to chemical energy. Light absorbed by chlorophyll drives a transfer of electrons and hydrogen from water to an acceptor called NADP+ (nicotin-amide adenine dinucleotide phosphate), which temporarily stores the energized electrons.
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- Close. The light and dark reactions in the chloroplast. The chloroplast is involved in both stages of photosynthesis. The light reaction takes place in the thylakoid discs. There, water (H 2 0) is oxidized, and oxygen (O 2) is released. The electrons freed up from water are transfered to ATP and NADPH.The dark reaction occurs outside of the thylakoids.he chloroplast is involved in both stages of photosynthesis. The light reaction takes place in the thylakoid discs. There, water (H 2 0) is oxidized, and oxygen (O 2) is released.
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What are the reactants in photosynthesis? There are two reactants in the photosynthesis equation: the carbon dioxide : 6CO2 and water : 6H2O
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What Are the Products of Photosynthesis? Specifically, plants use energy from sunlight to react carbon dioxide and water to produce sugar (glucose) and oxygen. Many reactions occur, but the overall chemical reaction for photosynthesis is: 6 CO2 + 6 H2O + light → C6H12O6 + 6 O2. Carbon Dioxide + Water + Light yields Glucose + Oxygen. In a plant, the carbon dioxide enters via leaf stomates by diffusion. Water is absorbed through the roots and is transported to leaves through the xylem. Solar energy is absorbed by chlorophyll in the leaves.
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- AP Biology. Photosynthesis: The Light-Dependent Reactions. Introduction. Photosynthesis is the process, by which autotrophs (plants) make organic compounds, such as sugars. Photosynthesis occurs in two phases: Light-Dependent Reations & The Calvin Cycle (also called the Light-Independent Reactions).
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What are the steps of light-dependent reactions of photosynthesis? Rating Newest Oldest. Best Answer: Photosynthesis occurs in 2 parts- The light reactions and the Calvin Cycle. The light cycle is dependent on light. Within the chloroplast, are sacs of organelles called thylakoids. (A stacked bundle of these are called Granum.) The Thylakoids membranes contain chlorophyll.
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Water splitting Photosynthesis works with two photosystems: Photosystems I (P700) and Photosystem II (P680). When photosystem I gets photo-excited, electron transfer reactions gets initiated, which results in reduction of a series of electron acceptors, eventually reducing NADP + to NADPH and PS I is oxidized.
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Photosynthesis 14. The photolysis of water, the release of molecular oxygen, and the photophosphorylation of ADP, and the resulting of ATP and NADPH are the processes that occur during the photochemical stage of photosynthesis.
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Photosynthesis: How Plants Transform Energy from the Sun The Dark Reactions. The second phase of the process of photosynthesis can occur in light or darkness. Energy stored in ATP made during the first phase of photosynthesis combines with carbon from carbon dioxide, as well as hydrogen, to eventually form glucose.
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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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- There are two primary types of photosynthesis, C3 and C4. C3 photosynthesis occurs when plants open their leaves during the day to absorb sunlight and use the enzyme RUBISCO to produce 3-phosphoglyceric acid, a molecule with three carbon atoms.owever, instead of immediately beginning to convert the compound into separate parts that can be used in the Calvin cycle, CAM plants wait until daylight, when they close off their pores to conserve water and work on producing energy by using the C3 process and the C4 compound they created during the night.
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- In summary, photosynthesis is a process in which light energy is converted to chemical energy and used to produce organic compounds. In plants, photosynthesis typically occurs within the chloroplasts located in plant leaves. Photosynthesis consists of two stages, the light reactions and the dark reactions.
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Only study guide for The chemical reaction of photosynthesis (as I hinted at in Detail #1) occur in two phases. Phase #1 is called photolysis or the photochemical reactions or (if you don't like those two names) the light reactions.
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Photosynthetic Cells Photosynthesis consists of both light-dependent reactions and light-independent reactions. In plants, the so-called light reactions occur within the chloroplast thylakoids, where the aforementioned chlorophyll pigments reside.
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Which process occurs during the light-dependent reactions in photosynthesis? Explanation: 1  The two main events i.e., photophosphorylation and photolysis of water. are occurred in the light-dependent reaction in photosynthesis. 2  In the photophosphorylation, the energy rich ATP is formed by the addition of phosphate in ADP. The photophosphorylation is of two types cyclic and non-cyclic.
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The light and dark reactions in the chloroplast Reason. Delete | Cancel. Close. The light and dark reactions in the chloroplast. The chloroplast is involved in both stages of photosynthesis. The light reaction takes place in the thylakoid discs. There, water (H 2 0) is oxidized, and oxygen (O 2) is released. The electrons freed up from water are transfered to ATP and NADPH.
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Introduction As it turns out, some of the light energy absorbed by pigments in leaves is converted to a different form: chemical energy. Light energy is converted to chemical energy during the first stage of photosynthesis, which involves a series of chemical reactions known as the light-dependent reactions. In this article, we'll explore the light-dependent reactions as they take place during photosynthesis in plants.
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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).hotosynthesis Photosynthesis is the process by which plants, some bacteria and some protistans use the energy from sunlight to produce glucose from carbon dioxide and water.
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- 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.
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Photosynthesis for Kids Photosynthesis occurs in two stages commonly known as Light dependent Reactions and the Calvin Cycle. Light dependent Reactions Light dependent reactions occur in the thylakoid membrane of the chloroplasts and take place only when light is available. During these reactions light energy is converted to chemical energy.
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Describe in general the two main stages of photosynthesis.? Events occurring during light reactions: Absorption of light energy by chlorophyll molecules. Splitting of water molecules into hydrogen and oxygen atoms. Formation of ATP and NADPH 2. Dark reaction s – This reaction does not require direct light and occurs in the stroma of chloroplasts.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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Describe in general the two main stages of photosynthesis.? The Dark Reactions can usually occur in the dark, if the energy carriers from the light process are present. Recent evidence suggests that a major enzyme of the Dark Reaction is indirectly stimulated by light, thus the term Dark Reaction is somewhat of a misnomer. The Light Reactions occur in the grana and the Dark Reactions take place in the stroma of the chloroplasts.
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- The two stages of photosynthesis are the light dependent and the  light independent. During the light reactions, light is converted  into energy by a process of transferring … electrons to and from a  special chemical called NADP. In the light independent stage,  called the Calvin Cycle, which uses that energy to change carbon  dioxide into sugars for the cell's use.