The light-dependent reactions use light energy to make two molecules needed for the next stage of photosynthesis: the energy storage molecule ATP and the reduced electron carrier NADPH. In plants, the light reactions take place in the thylakoid membranes of organelles called chloroplasts.
Considering this, what is the light dependent reactions of photosynthesis?
Light-Dependent Reactions of Photosynthesis. The first major set of processes in photosynthesis, in which light energy is initially converted into chemical energy as ATP and NADPH, takes place across the chloroplast thylakoid membranes, between the chloroplast stroma and the thylakoid space.
What occurs in a light dependent reaction?
At the end of the light-dependent reactions, chloroplasts have converted and stored solar energy in the chemical bonds of ATP, and produced high-energy electrons stored as NADPH. Chloroplasts use this energy to drive the light independent reactions that produce the final sugar molecules.
What happens in the light reactions of photosynthesis?
It is during these reactions that the energy from sunlight is absorbed by the pigment chlorophyll in the thylakoid membranes of the chloroplast. The energy is then temporarily transferred to two molecules, ATP and NADPH, which are used in the second stage of photosynthesis.