non-cyclic LDR

• step 1


  light energy is absorbed by PSII
• step 2


  light energy excites electron in photosystem to a higher energy level
• step 3


  excited electron loses energy as it moves along the electron transport chain
• step 4


  energy lost from ETC goes to hydrogen pump (H+ pumped from stroma to thylakoid using ATP) creating an electrochemical gradient
• step 5


  light energy causes photolysis of water
• step 6


  electron produced replaces the one in PSII
• step 7

  2 1/2 O2 form O2 (waste)
• step 8


  2 hydrogen ions add to electrochemical gradient in thylakoid
• step 9


  hydrogen ions move down concentration gradient to stroma via chemiosmosis through ATP synthase causing it to change shape and form ATP from ADP + Pi
• step 10


  light energy is absorbed by PS1 which excites electron
• step 11


  electron is transferred to NADP with H+ from stroma so NADP has been reduced