| Read the following four statements. A, B, C and D and select die right option having both correct statements. [AIPMT (M) 2010] A. Z secheme of light reaction takes place in presence of PS-I only. B. Only PS-I is functional in cyclic photophosphorylation. C. Cyclic photophosphorylation results into synthesis of ATP and \[NADP{{H}_{2}}.\] D. Stroma lamellae lack PS-II as well as NADP. |
A) B and D
B) A and B
C) B and C
D) C and D
Correct Answer: A
Solution :
| [A] Cyclic photophosphorylation is performed by PS-I only. In this process, an electron expelled by the excited photocentre, ie, \[{{\text{P}}_{\text{700}}}\]is returned to it after passing through a series of electron carriers. PS-I is located on both the non-appressed part of grana thylakoids as well as stroma thylakoids, while PS-II is located in _the appressed part of grana thylakoids only, stroma thylakoids lack PS-II. |
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