m_ms09, you seldom do go deep in photosystem II!
I myself is working in the academia on how to mimic the photosystem II to build a artificial system for converting the light energy to a chemical energy carrier. I am "living" with these little details daily so I have a hard time to just ignore this kind of simplified descriptions that floats around.
For you that like to know there are very few organism were Photosystem I and II are studied, and I should say that one of the most well studied is spinach! More or less everything we knows on a molecular level comes from either spinach or some strain of cyanobacteria!
Sorry for this
I could not resist the opertunity....