Photosynthesis

There are two things that get Photosynthesis going: Light Reactions and the Calvin Cycle.
Light Reactions:

In summary, the light-dependent reactions uses solar power to generate ATP and NADPH₂, which provide chemical and reducing power, respectively, to the sugar-making reactions of the Calvin cycle. An incidental by-product of the light-dependent reactions is oxygen.

The Calvin Cycle:


The Calvin Cycle  it uses ATP as an energy source and consumes NADPH₂ as reducing agent for adding electrons to make the glucose. 3 parts of the cycle:  In Carbon Fixation, CO₂ is incorporated into an enzyme which catalyzes this 1st step is RuBP carboxylase or rubisco.  In reduction,  ATP and NADPH₂ from the light reactions are used to convert 3-phosphoglycerate to G3P. In regeneration, more ATP is used to convert some of G3P back to RuBP, the acceptor for CO₂, thereby completing the cycle. For every 3 molecules of CO₂ that enter the cycle, the net is 1 molecule of (G3P). For each G3P synthesized, the cycle spends 9 molecules of ATP and 6 molecules of NADPH₂. The light reactions keep the Calvin cycle going by regenerating the ATP and NADPH₂. This takes place in the Stroma.