DENDROLOGY

Detailed explanation-1: -Light-dependent reactions happen in the thylakoid membrane of the chloroplasts and occur in the presence of sunlight. The sunlight is converted to chemical energy during these reactions. The chlorophyll in the plants absorb sunlight and transfers to the photosystem which are responsible for photosynthesis.

Detailed explanation-2: -The light-dependent reactions of photosynthesis take place within the thylakoids. These reactions occur when the pigment chlorophyll, located within the thylakoid membranes, captures energy from the sun (photons) to initiate the breakdown of water molecules.

Detailed explanation-3: -14.5 The dark reactions: the Calvin cycle. Carbon dioxide is fixed by a series of light-independent reactions, called the dark reactions, which utilize the NADPH and ATP generated by light-dependent electron transport within the thylakoid membranes.

Detailed explanation-4: -(i) Light reactions occur in grana thylakoids whereas dark reactions occur in stroma of chloroplasts.