Light - Dependent reaction 0.0 / 5 ? BiologyBiological molecules, organic chemistry and biochemistryA2/A-levelOCR Created by: HollyCreated on: 26-04-14 18:28 What does the light dependent reaction need? Light energy 1 of 11 Where does it take place? Thylakoid membranes 2 of 11 What absorbs the light energy? Photosynthetic pigments in photosystems 3 of 11 What is the light energy converted to? Chemical energy 4 of 11 What two things is the light energy used for? Add a phosphate group to ADP to form ATP & reduce NADP to reduced NADP 5 of 11 What do the two products do? Transfer energy & hydrogen to light - independent reaction 6 of 11 What happens to H20? Oxidised to O2 7 of 11 What does non cyclic photophosphorylation create? ATP, reduced NADP, o2 8 of 11 What does cyclic photophosphorylation create? Only ATP 9 of 11 What is the reason for this difference? Cylic only uses PSI, so electorns are passed back to PSI via electron carriers 10 of 11 What happens to the electrons? Electrons are recycled & can repeatedly flow through PSI not used to reduce NADP 11 of 11
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