BIO SCI 93 Chapter Notes - Chapter 10.3: Plant Cell, Light-Independent Reactions, Carbon Fixation
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9 May 2016
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The calvin cycle uses the chemical energ of atp and. Nadph to reduce co2 to sugar: while the citric acid cycle is catabolic, oxidizing acetyl coa and using the energy to synthesize atp. The calvin cycle is anabolic, building carbohydrates from smaller molecules and consuming energy. Carbon enters the calvin cycle in the form of. Co2 and leaves it in the form of sugar. For 1 g3p the cycle must take place 3 times fixing 3 co2: there are 3 phases in the calvin cycle: Phase 1: carbon fixation: calvin cycle incorporates each co2 molecule, one at a time, by attaching it to a 5-carbon sugar (ribulose bisphosphate rubp), the enzyme that catalyzes the 1st step is rubp carboxylase-oxygenase (rubisco) Ribulose bisphosphate (rubp) carboxylase- oxygenase, the enzyme that normally catalyzes the first step of the calvin cycle (the addition of.
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