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Long Answer TypeNon-Cyclic Photophosphorylation : The electrons lost by P680 (PS-II) are taken up by P700 (PS-I) and do not get back to P680 i.e., unidirectional and hence it is called non- cyclic phosphorylation. It involves both PS I and PS II. In this cycle both ATP and NAD(P)H are formed. 
Fig. Non-cyclic photophosphorylation
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