What is the photosystem?

A photosystem comprises a collecting antenna and a reaction center. In the thylakoid membranes, photosynthetic pigments form a complex antenna or antenna. The antennas pigment molecules absorb light and transmit the energy from a molecule to another until the reaction center is reached. This center includes a pair of specialized molecules of chlorophyll "a". These are the only molecules that can transfer electrons to an electron acceptor.