Photosynthesis is used by plants and organisms to convert light energy into chemical energy that can be released to fuel the organisms' activities.
The Calvin cycle is light-independent reactions in photosynthesis that take place in three steps. Although the Calvin Cycle is not just dependent on light it is indirectly dependent on light since the energy carriers are products of light dependent reactions.
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The light independent reactions of photosynthesis are chemical reactions that change carbon dioxide and other compounds into glucose. These reactions occur in the stroma the fluid filled area of a chloroplast outside of the thylakoid membranes.
In light-dependent reactions, the energy from sunlight is absorbed by chlorophyll and changed into chemical energy in the form of electron carrier molecules like ATP and NADPH.
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