Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Non-cyclic photophosphorylation is performed by: (1) dark reaction (2) \[\text{PS-I}\] (3) only PS-I (4) \[\text{PS-II}\]A) 1,2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: C
Solution :
Non-cyclic photophosphorylation is carried out in collaboration of both photosystems\[\text{-I}\] and \[\text{II}\text{.}\] Electrons released during photolysis of water are pickedupbyphotocentre of \[\text{PS-II}\]\[\text{PS-II}\] called \[{{\text{P}}_{680.}}\]The same is extruded out when the photocentre absorbs light energy (hv.) The extruded electron has an energy equivalent to 23 kcal/mole. It passes through a series of electron carriers-Phaeophytin, PQ cytochrome b-f complex and plastocyanin. while passing over cytochrome complex, the electron loses sufficient energy for the synthesis of ATR The electron is handed over to photocentre \[{{\text{P}}_{700}}\] of \[\text{PS-I}\] (One) by plastocyanin.
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