Photosynthesis takes place in what two stages?
Light dependent reactions and Calvin cycle (light independent)
Photosynthesis occurs in two stages.
1) The light-dependent reactions occur in the thylakoid membrane of the chloroplasts. These reactions require light energy to convert ADP (adenosine diphosphate) into ATP (adenosine triphosphate) in the presence of water, producing molecular oxygen (O2) as a byproduct.
2) The light-independent reactions, also known as the Calvin cycle or dark reactions, take place in the stroma of the chloroplasts. In this stage, the ATP and NADPH (nicotinamide adenine dinucleotide phosphate) produced during the light-dependent reactions power a series of chemical reactions that convert CO2 (carbon dioxide) into glucose, a type of sugar. This process does not require light directly, but its results depend on the availability of ATP and NADPH produced in the light stage.
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