Single Choice

Read the following statement and select the correct ones. (i) PS I is involved in non-cyclic photophosphorylation only. (ii) PS II is involved in both cyclic and non-cyclic photophosphorylation. (iii) Stroma lamellae membranes possess PS I only, whereas grana lamellae membranes possess both PS I and PS II.

A(i) only
B(ii) only
C(iii) only
Correct Answer
D(i), (ii) and (iii)

Solution

PSI is involved in both cyclic and non - cyclic photophosphorylation. PS II is involved only in non - cyclic photophosphorylation. PS II is present in the appressed (inner) part of grana thylakoids. PS I is located in the non- appressed (outer) part of grana thylakoids as well as stroma thylakoids.

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