Confused and have questions? We’ve got answers. With Chegg Study, you can get step-by-step solutions to your questions from an expert in the field. If you rather get 1:1 study help, try 30 minutes of free online tutoring with Chegg Tutors.

Photosystem II

From Biology-Online Dictionary | Biology-Online Dictionary
Jump to: navigation, search



The photosystem that absorbs light for use to drive the oxidation of water and the reduction of plastoquinone, and whose reaction center chlorophyll is P680.


Photosystem II is named as such since it is discovered after photosystem I. Their names do not represent the electron flow as it begins in photosystem II I (i.e. when both of them are present in the organism, e.g plants and algae). When photosystem II releases an excited electron, it returns to its ground state by accepting an electron from the oxidation of water molecule whereas photosystem I receives its electron from the electron transport chain, which in turn received an electron from photosystem II.

Abbreviation: PS II

Compare: photosystem I

See also: P680