Question

what are the differences between light reaction and dark reaction in plants?

Answer 1

light reaction
it take place in the presence of sunlight only
it takes place in graana 
it is dependent
dark reaction
it take place in the presence of sunlight and also in dark
it takes place in stroma
it is independent

Answer 2

Light reaction depends on light and takes place in the grana of the chloroplast. Dark reaction is light independent and takes place in the stroma of the chloroplast.