Photosystem-$I$ $(PS-I)$ is associated with which of the following?

Quantasomes are present in

Which of the following occurs first in the light reaction?

The first electron carrier molecule from $P_{700}$ to $NADP^+$ is believed to be

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:

Describe the structure of the $ATPase$ enzyme.