What are the steps in the Light Dependent and Light Independent Phases

Photosynthesis occurs in two parts -- The light reactions and the Calvin Cycle.

The light cycle is dependent on light.

Within the chloroplast, are sacs of organelles called thylakoids. (A stacked bundle of these are called Granum.) The Thylakoids membranes contain chlorophyll. The chlorophyll is a pigment that absorbs the light from the sun.now for the steps of the light reactions.

1) The light absorbed by chlorophyll causes a transfer of electrons and H+ from H20 molecules already present. This causes the H20 to split into molecular oxygen (02) and a H+ ion.

2) The O2 is released (we breathe it) and the H+ bonds to NADP+ creating NADPH

3) ATP is formed through photophosphorylation. (ADP gets a phosphate group added to it creating ATP)

4) The NADPH and the ATP created here go on to fuel the reactions in the second part of photosynthesis - The Calvin Cycle