Question

differentiate between light reaction and dark reaction

Answer 1

Light Reaction

-also known as light phase or photochemical reaction
 
- it takes place in grana 

-absorbtion of sunlight by chlorophyll molecules

- energy is tranferred from electrons 

- energy from electrons used for formation of ATP

- splitting of water molecule into H and O ( photolysis)

-formation of ATP from ADP

- formation of NADPH 

Dark Reaction

-also known as dark phase or fixation reaction.

- CO2 enters in the reaction 

- reduction of CO2 takes place into carbohydrates 

- hydrgen is taken from NADPH 

- energy is used from ATP 

- process of fixaton of CO2 also called calvin's cycle 

# hope it helps !

Answer 2

**light reaction occurs in grana of chloroplast. Using light enery, water molecules and split out to release oxygen..
**Dark reaction take place in the stroma of chloroplast by reducing carbon dioxide to carbohydrate, utilising energy from ATP