Differences between PS1 AND PS2.
Answers
Explanation:
Photosystem I and Photosystem II (PS I vs PS II)
Photosystem I (PS I)
Photosystem II (PS II)
PS I is located at the outer surface of the grana thylakoid membrane (non appressed granal regions and stroma lamella).
PS II is located at the inner surface of the grana thylakoid membrane (appressed granal region).
The photocentre or reaction centre is P700.
The photocentre is P680.
PS I has an iron-sulphur (FeS) type reaction centre (or type I)
PS II has a quinone type reaction centre (also known as Q-Type or type II)
The core complex of PSI is composed by a smaller number of proteins (~15 subunits) than PSII
The core of PSII is a multi-subunit complex composed of about ~25-30 subunits.
Pigments absorb longer wavelengths of light (>680nm).
Pigments absorb shorter wavelengths of light (<680nm).
Rich in chlorophyll a than chlorophyll-b
Rich in chlorophyll b than chlorophyll-a
Participates in cyclic as well as non cyclic photophosphorylation.
Participates only in non-cyclic photophosphorylation.
It is not associated with photolysis of water.
It is associated with photolysis of water.
PS I generates a strong reducing agent (reducing NADP+ to NADPH) and a weak oxidant
PS II is the strong oxidant (capable of oxidizing H2O) and a weak reductant
Main function is ATP synthesis in cyclic photophosphosphorylation and NADPH synthesis in non-cyclic photosynthesis.
Main functions are ATP synthesis and hydrolysis of water.
Answer:
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