Photosynthesis in plants occurs in two stages. These stages are known as the light-dependent reactions and the Calvin Cycle.
The first stage of photosynthesis is the light dependent reactions. These reactions take place on the thylakoid membrane inside the chloroplast. During this stage light energy is converted to ATP (chemical energy) and NADPH (reducing power).
<span>The second stage of photosynthesis is the Calvin Cycle. These reactions occur in the stroma of the chloroplast. Energy from ATP and electrons from NADPH are used to convert carbon dioxide into glucose and other products.</span>
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Addition of a nucleotide onto a DNA is an endergonic reaction. In such reactions, the energy is provided by ATP.
ATP is the immediate source of energy for any endergonic reaction occuring in the body. Reactions such as addition of nucleotides are endergonic and anabolic reaction that is, these reactions consume energy which is provided by ATP.
