The electrons needed to replace those removed from photosystem $I$ are provided by $:$

The chemiosmotic hypothesis for the synthesis of $ATP$ in chloroplasts and mitochondria is based on which of the following?

Most herbicides attack

In photosynthesis,photolysis of water is used in

The mechanism of $ATP$ formation both in chloroplast and mitochondria is explained by

Which are incorrect sentences for non-cyclic photophosphorylation?
$(1)$ $Z$ shape is formed when all the carriers are placed in a sequence on a redox potential scale.
$(2)$ The $4e^-$ released are accepted by various electron acceptors and finally enter into $PS-II$ instead of returning to $PS-I$.
$(3)$ In this process both $PS-I$ and $PS-II$ take part.
$(4)$ As the electrons released in various ways do not return to their original donors,such an electron transport is called non-cyclic electron transport.