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- The light-independent reactions of photosynthesis are the four reactions that take place in the later part of the photosynthesis process. Also known as the Calvin cycle, the four steps of the light-independent or dark reactions are carbon fixation, reduction, carbohydrate formation and regeneration of the initial enzymes.
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The reactions that make up the process of photosynthesis can be divided into light-dependent reactions, which take place in the thylakoids, and light-independent reactions (also known as dark reactions or the Calvin cycle), which take place in the stroma.
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Using the energy carriers formed in the first steps of photosynthesis, the light-independent reactions, or the Calvin cycle, take in CO 2 from the environment. An enzyme, RuBisCO, catalyzes a reaction with CO 2 and another molecule, RuBP.
The light reactions of photosynthesis liberate oxygen, and more oxygen dissolves in the cytosol of the cell at higher temperatures. Therefore, high light intensities and high temperatures (above ~ 30°C) favor the second reaction and result in photorespiration.
Jun 21, 2024 · The light-independent stage, also known as the Calvin cycle, takes place in the stroma, the space between the thylakoid membranes and the chloroplast membranes, and does not require light, hence the name light- independent reaction.
May 12, 2018 · The light-independent reactions of photosynthesis are the four reactions that take place in the later part of the photosynthesis process. Also known as the Calvin cycle, the four steps of the light-independent or dark reactions are carbon fixation, reduction, carbohydrate formation and regeneration of the initial enzymes.
The light reactions take place in the thylakoid. There, water (H 2 O) is oxidized, and oxygen (O 2 ) is released. The electrons that freed from the water are transferred to ATP and NADPH.
Jul 6, 2024 · Light Reactions Overview. The light reactions of photosynthesis are the initial phase where light energy is captured and converted into chemical energy. This process takes place in the thylakoid membranes of the chloroplasts, where pigment molecules like chlorophyll absorb photons.
