The assimilatory power produced during the light reaction in green algae is:

Which of the following elements are required for the photolysis of water?

Assertion $(A) :-$ The whole scheme of transfer of electrons starting from $PS-II$ to $NADP^{+}$ is called $Z-scheme$.
Reason $(R) :-$ When all the carriers of this scheme are placed in sequence on a redox potential scale,they appear like $Z$.
In the light of the above statements,choose the correct answer from the options given below:

Absorption of light by chlorophyll of $PS-II$ causes

What are the full names of the following abbreviations used in photosynthesis?
$(1)$ $PS-I$
$(2)$ $PS-II$

The source of $O_2$ liberated in photosynthesis in green plants is: