Question

define dark reaction and light reactin in leaf in detail please

Answer 1

photosynthesis is involved or have two processes
1.light reaction which occur in thylakoid (granum)
2.dark reaction occurs in stroma (fluid matrix)

Answer 2

dark reaction. Any of the chemical reactions that take place during the second stage of photosynthesis and do not require light. During the dark reactions, energy released from ATP (created by the light reactions) drives the fixation of carbon from carbon dioxide in organic molecules.
These reactions take place in the stroma of chloroplasts, outside the thylakoid membrane.....
hope i helped u....