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)

(ii) and (iv)

Answer 2

$Z$ 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