Question

what is the difference between light reaction and dark reaction?

Answer 1

in the light reaction the plant is kept under light which is used for preparation of food by photosynthesis of plants and in dark the plant kept in dark region

Answer 2

1) light reaction need light to produce organic energy molecules(ATP and NADPH).dark reaction make use of these energy molecules.
2) light reaction is also called photo chemical phase.dark reaction is also called bio synthetic phase.
3) light reaction takes place in grana thylakoids of chloroplast.dark reaction takes place in stroma of the chloroplast.
4) in light reaction  water molecule splits and and oxygen is released.in dark reaction carbon dioxide is utilized and glucose is produced.
            Hope it helps u...