The Calvin Cycle is completed in _ stages:

Explanation

Calvin cycle is a cyclic enzyme-controlled process which involves the reduction of carbon dioxide in the presence of ATP and NADPH to form sugars. The process occurs in the stroma of the chloroplast. The Calvin cycle can be simplified into three stages:Carbon Fixation: A molecule of RuBP accepts CO2 in the presence of the enzyme rubisco to form an unstable 6-carbon intermediate which splits to form 2 molecules of glycerate-3-phosphate (GP). The combination of RuBP with CO2 is known as carbon fixation.Reduction of GP: Each phosphoglycerate molecule undergoes reduction using ATP and NADPH to form triose phosphate.Regeneration of RuBP: Most triose phosphate molecules use energy in the form of ATP to regenerate RuBP.One complete turn of the cycle consumes 9 ATP molecules and 6 NADPH molecules to form one molecule of triose phosphate.