Question
Describe about non-cyclic photophos-phorylation.
Solution
Non-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
