1. Photosynthesis Step 1: Light Reaction – occurs in the thylakoids inside the chloroplast
Chlorophyll in the thylakoids 1a e- 1b
ATP h
NADP + H = NADPH
Electron transport chain
Water
+ O2 + H+ 1d 1c e-
1d. Photolysis: Water is broken down into oxygen (given off by plant), electrons (replace lost electrons in chlorophyll), and H+ that join with NADP to form NADPH. These electrons return to chlorophyll so the light reaction can happen again.
1c. Electrons move down the electron transport chain (series of proteins that pass the electrons along). ADP uses energy from electrons to make ATP..
1b. Electrons raised to higher energy level in the chlorophyll atoms
1a. Light energy is absorbed by the chlorophyll

2. Calvin Cycle 1 glucose ATP becomes ADP NADPH NADPH becomes NADP
Photosynthesis Step 2: Dark Reaction (Calvin Cycle) – Occurs in the STROMA
Calvin Cycle
ATP
Carbon
dioxide
from the air
1 glucose
Electrons and ATP from light reaction get dumped into the Calvin Cycle to run it.
ATP becomes ADP
NADPH
NADPH becomes NADP
Energy from ATP and Hydrogen from NADPH combine to form glucose.
Calvin Cycle: Series of steps that build up compounds using carbon dioxide from the air.