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The three phases of the Calvin Cycle are following:

Phase 1- Carbon Fixation: Carbon dioxide is added to RuBP making a six carbon molecule, which happens to be rubisco. The six carbon molecule immediately split into two three carbon PGA.

Phase 2- Reduction Reaction: First PGA is phosphorylated and then it has hydrogen added to it, making six G-3-P.

Phase 3- Regeneration of RuBP: Through a series of reaction ATP is used to rearrange five G-3-P into three RuBP.

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Agustina Macejkovic

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2y ago
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11y ago

Photosynthesis Have 2 Phases.

1. Light-Dependent -> occurs in the Granum

ed: this stage is also called the Light Stage. The main point is to harvest light energy, which is then used to create reducing power (ie. NADP+ coenzymes are converted into the reduced form NADPH. The hydrogen comes from the splitting of water. Oxygen gas is released as a by-product.)

2. Light-Independent -> Dark reaction/ Carbon Fixation

-> Occurs in the Stroma

ed: Also called the Dark Stage, or the Calvin Cycle (named after Melvin Calvin). Carbon dioxide gas is captured from the atmosphere and is reduced (using the coenzymes from the Light Stage) to form carbohydrates.

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Q: What are the phases of the Calvin cycle?
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