What do herbicides primarily interfere with?

When the two pigment systems absorb light,in what direction does the energy flow between them?

The '$Z$' scheme of photosynthesis was proposed by

Which scientists are associated with the light reaction and its site?

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

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: