The light reactions, or the light-dependent reactions, are up first. We call them either and both names. The whole process looks a little like this: Best Answer: These are the two stages of photosynthesis. The light DEPENDENT reaction is the first one - and it is, obviously, reliant on sunlight. The. Overview of the light-dependent reactions, including the structure of the chloroplast, the photosystems, and how ATP is synthesized. More detail on the light-dependent reactions and photophosphorylation. Covers the photosystems, photosynthetic electron transport chain, and cyclic and non-cyclic. See also:Calvin cycle. In the light-dependent reaction, light energy from the sun is used to split water which has been sucked in by plants by transpiration. Light-independent reactions take place in plant chloroplasts. In this process sugars are made from carbon dioxide. The process, known as the Calvin cycle, uses. In photosynthesis, the light-dependent reactions take place on the thylakoid membranes. The inside of the thylakoid membrane is called the lumen, and outside the. The light-independent reactions of photosynthesis are chemical reactions that convert carbon dioxide and other compounds into glucose. These reactions occur in the. Learn more about processes of the light-dependent reactions in the Boundless open textbook. There are two photosystems consisting of chlorophyll and associated molecules. The first in the chain - photosystem II - absorbs light best at wavelength 680 nm and.