Photosynthesis: Light and Dark Reactions. This second phase of photosynthesis takes the atoms of the chemical energy created in the thylakoids and changes them into simple sugars that can be used or stored by the plant, depending on its energy needs. The first phase of photosynthesis is the light-dependent reactions. The two successive stages in which photosynthesis takes place are: The Light-dependent reactions; The Calvin Cycle, or the light-independent reactions; Let’s have a detailed look at these stages: The Light-dependent Reactions. That’s because it needs the energy produced by the light reaction that comes before it. Eukaryotes like plants and green algae contain membrane bounded organelles which aid them to perform photosynthesis. The dark reaction involves a cycle called the Calvin cycle in which CO 2 and energy from ATP are used to form sugar. Light-independent reaction is also called the dark reaction or the Calvin cycle. Photosynthesis takes place through several steps which occur during two stages: the light phase and the dark phase. (ii) An oxygenic photosynthesis (without the evolution of O 2) takes place in photosynthetic bacteria. Photosynthesis, Light Reaction, Dark Reaction - Coggle Diagram: Photosynthesis (Introduction), Light Reaction (Electron Transport System 1) This is basically the downhill movement of an excited electron. This reaction takes place in another section in the stroma. The dark reaction doesn't require sunlight to work. Dark reaction of Photosynthesis is light independent reaction, hence it takes place both in the light as well as in dark - the reaction is known as Calvin cycle - where the co2 is fixed. Structure of a mesophyll cell. While the light reaction takes place in the thylakoid membranes, the ATP and NADPH it produces end up in the stroma. These reactions occur in the stroma of the chloroplast. Structure of a mesophyll cell Gravity. Photosynthesis takes place in two stages, namely light-dependent reactions and light-independent reactions. This phase requires sunlight. Photosynthesis takes place inside plant cells in small things called chloroplasts. Charlotte_Davis39. During dark reaction assimilatory power is utilized to synthesize glucose. are chloroplasts more likely in animal or plant cells? n plants, photosynthesis usually occurs in the leaves. Test. The Calvin cycle is sometimes also called the dark reaction because none of its steps require light. PLAY. The light-independent reactions of photosynthesis are chemical reactions that convert carbon dioxide and other compounds into glucose. Dark Reactions Takes place in the stroma within the chloroplast, and converts CO 2 to sugar. Learn. Match. Terms in this set (37) in what organelle does photosynthesis take place? Dark reactions ( Enzymatic reactions ) is a group of reactions that occurs in the stroma of chloroplast in which the temperature is the limiting factor for the rate of photosynthesis, so , these reactions can occur in both the light and darkness . Dark reactions. But it still happens during the day. Below are the other parts of the cell that work with the chloroplast to make photosynthesis happen. The process of photosynthesis is basically divided into two steps i.e Light reactions and dark reactions (known as Calvin cycle or #C_3# pathway). (i) Oxygenic photosynthesis (with evolution of O 2) takes place in green eukaryotes and cyanobacteria (blue-green algae). Chloroplasts (mostly found in the mesophyll layer) contain a green substance called chlorophyll. STUDY. Doesn't directly need light in order to occur, but it does need the products of the light reaction (ATP and another chemical called NADPH). Write. chloroplast. But what is the main purpose of this? Created by. 2. Flashcards. 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