How many electrons at a time are passed between the pigment molecules in the light-harvesting complexes?

In the light-harvesting complexes, no electrons are passed between the pigment molecules at a time.

ZERO (0)

Chlorophyll is the light harvesting pigment which makes the light-harvesting complex during the process of photosynthesis. The photosynthesis process is characterized by two reactions: light reaction and dark reaction. During the light reaction, the pigment absorbs light and it becomes excited and photons are released that further carry out the reactions. In this step, the electrons are only excited, not transferred in the reaction.