Question

Read the following statements.
(i) Z scheme of light reaction takes place in presence of PS I only.
(ii) Only PS I is functional in cyclic photophosphorylation.
(iii) Cyclic photo phosphorylation results into synthesis of ATP and $NADPH_2$.
(iv) Stroma lamellae lack PS II as well as NADP.
Which of these statements are correct?

• A. (ii) and (iv)
• B. (i) and (ii)
• C. (ii) and (iii)
• D. (iii) and (iv)

Answer 1

Answer: (A)

$Z$ scheme involves both $PSI$ and $PSII$ to transfer electron excited by light starting from $PSII$ uphill to the acceptor, down to the electron transport chain to $PSI$, which further comprise of excitation of electrons, transfer to another acceptor and finally down hill to $NADP^{+}$ causing reduction of it to $NADOH+H^{+}$. Stroma lamella contains $PSI$ only