Biology A2

Light dependent reactions:

• Take place in the thylakoid membranes in chloroplasts
• Uses energy from light and hydrogen from photolysis of water 
• Produces reduced NADP (co-enzyme), ATP(energy transfer molecule) and Oxygen
• Oxygen is either directly used in respiration or released into the atmosphere

Light Independent reactions:

• Takes place in the stroma (enzymes available in the fluid) 
• Uses reduced NADP and ATP formed in LDR to reduce carbon dioxide to carbohydrates through calvin cycle
• Hydrogen is stored in carbohydrates (glucose) or converted into other organic materials