Question

Select correct match:

$\begin{array}{cccc}\text{(a)}& \text{OEC}& \left(i\right)& \text{Primary e-acceptor}\\ \text{(b)}& \text{NADP}& \left(ii\right)& \text{Photolysis of}\\ & & & H_{2}O\\ \text{(c)}& \text{Succinyl}& \left(iii\right)& \text{Outer surface of}\\ & \text{CoA}& & \text{thylakoid membrane}\\ \text{(d)}& \text{Pheophytin}& \left(iv\right)& \text{Chlorophyll}\\ & & & \text{synthesis}\end{array}$

• A. $a\left(ii\right),b\left(iii\right),c\left(iv\right),d\left(i\right)$
• B. $a\left(ii\right),b\left(iii\right),c\left(i\right),d\left(iv\right)$
• C. $a\left(iii\right),b\left(i\right),c\left(ii\right),d\left(iv\right)$
• D. $a\left(i\right),b\left(ii\right),c\left(iii\right),d\left(iv\right)$

Answer 1

The correct option is A $a\left(ii\right),b\left(iii\right),c\left(iv\right),d\left(i\right)$

The oxygen-evolving complex (OEC), also known as the water-splitting complex, is a water-oxidizing enzyme involved in the photo-oxidation of water during the light reactions of photosynthesis. The splitting of water is associated with the PS II - water is split into $H^{+}$, [O] and electrons. This releases oxygen, one of the net products of photosynthesis. The electrons needed to replace those removed from photosystem I are provided by photosystem II.
$2H_{2}O\to 4H^{+}+O_2+4e^{-}$

The NADP reductase enzyme is located on the stroma side of the membrane (outer surface of thylakoid membrane). Along with electrons that come from the acceptor of electrons of PS I, protons are necessary for the reduction of NADP+ to $NADPH+H^{+}$.

For biosynthesis of chlorophyll, raw materials required are succinyl Co-A and glycine.

The primary electron acceptor of PS II is pheophytin, an organic molecule that resembles chlorophyll.