Differentiate between PS I and PS II

PSI	PSII
1.PSI is located at the outer surface of the grana thylakoid membrane. (non-appressed region ans stroma lamella)	1. PSII is located at the inner surface of the grana thylakoid membrane. (appressed granal region)
2. The photocenter or reaction center in PSI is P700.	2. The photocenter in PSII is P680.
3. PSI has an iron-sulfur (Fe-S) type reaction center (or type-I).	3. PSII has a quinone type reaction center (also known as Q-type).
4. The core complex of PSI is composed by a smaller number of proteins (15 subunits)	4. The core complex of PSII is a multi-complex composed of about 25-30 subunits.
5. Pigments absorb longer wavelength of light (>680nm)	5. Pigments absorb shorter wavelength of light (<680 nm)
6. Participate cyclic and non-cyclic phosphorylation.	6. Participate only cyclic phosphorylation.
7. PSI takes electrons from plastocyanin and reduces ferredoxin.	7. PSII  splits water to form proton and O2 and reduces plastoquinone.