During non-cyclic photophosphorylation,when electrons are lost from the reaction centre at $PS$ $II$,what is the source which replaces these electrons?

Who proposed the $Z$-scheme for light reaction?

Splitting of water in photosynthesis is called

Identify the correct statements regarding chemiosmotic hypothesis :
$(a)$ Splitting of the water molecule takes place on the inner side of the membrane.
$(b)$ Protons accumulate within the lumen of the thylakoids.
$(c)$ Primary acceptor of electron transfers the electrons to an electron carrier.
$(d)$ $NADP$ reductase enzyme is located on the stroma side of the membrane.
$(e)$ Protons increase in number in stroma.
Choose the correct answer from the options given below:

Which photosystem is inactive in the red drop effect?

The reaction centres for $PS-I$ and $PS-II$ are