The reactions of photosynthesis make up a biochemical pathway.
What are the reactants and products for both light and dark reactions.

Explanation

(a) Light reactions are carried out in the Thylakoid membranes (Grana) of the chloroplast which use water and energy from the Sun to produce NADPH, ATP and Oxygen. The Dark reaction is carried out in the stroma of chloroplast. It uses NADPH, ATP and `CO_2` and produces NADP + ADP + P and high energy sugars.
(b) The Light reactions use light to synthesize ATP and NADPH. The dark reaction or Calvin cycle uses these reactants to produce sugar from additional `CO_2` molecule. This cycle then produces `NAP + ADP+P_i` (inorganic phosphate) which is used in the light reactions, with water molecules to produce ATP and NADPH again.