PHOTOSYNTHESIS
THE CALVIN CYCLE
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Detailed explanation-1: -The Calvin cycle uses 18 ATP and 12 NADPH molecules to produce one glucose molecule.
Detailed explanation-2: -The conversion of CO2 to carbohydrate is called Calvin Cycle or C3 cycle and is named after Melvin Calvin who discovered it. The plants that undergo the Calvin cycle for carbon fixation are known as C3 plants. Calvin Cycle requires the enzyme ribulose-1, 5-bisphosphate carboxylase/oxygenase commonly called RuBisCO.
Detailed explanation-3: -The carbohydrate products of the Calvin cycle are three-carbon sugar phosphate molecules, or “triose phosphates", namely, glyceraldehyde-3-phosphate (G3P).
Detailed explanation-4: -Glucose is first split into glyceraldehyde 3-phosphate (a molecule containing 3 carbons and a phosphate group). This process uses 2 ATP. Next, each glyceraldehyde 3-phosphate is converted into pyruvate (a 3-carbon molecule). this produces two 4 ATP and 2 NADH.