Photosystem II | Photosystem I
---------------- | ---------------
Location: thylakoid membrane | Location: thylakoid membrane
Function: absorbs photons to initiate photosynthesis and produces ATP | Function: absorbs photons to re-energize electrons and produces NADPH
Primary pigment: chlorophyll a and b | Primary pigment: chlorophyll a
Electron transport: passes electrons to photosystem I | Electron transport: receives electrons from photosystem II
P680 reaction center: absorbs light at a wavelength of 680 nm | P700 reaction center: absorbs light at a wavelength of 700 nm
Produces oxygen as a byproduct | Does not produce oxygen
Contains cytochrome b559, Mn4Ca cluster, and chlorophyll a | Contains iron-sulfur centers and chlorophyll a
Requires two photons to produce one molecule of oxygen | Requires four photons to produce one molecule of NADPH
Evolved first in the evolution of photosynthesis | Evolved second in the evolution of photosynthesis
Helps in the establishment of the proton gradient | Uses the proton gradient established by photosystem II
Compare the photosystem II and photosystem I protein complexes compounds by tabulating the differences and similarities
3 answers
Compare the photosystem II and photosystem I protein complexes compounds by tabulating similarities
Photosystem II | Photosystem I
---------------- | ---------------
Location: thylakoid membrane | Location: thylakoid membrane
Function: participates in photosynthesis | Function: participates in photosynthesis
Contain chlorophyll a as a primary pigment | Contain chlorophyll a as a primary pigment
Involved in electron transport chain | Involved in electron transport chain
Contribute to the production of energy-rich compounds | Contribute to the production of energy-rich compounds
Essential for the conversion of light energy into chemical energy | Essential for the conversion of light energy into chemical energy
Play a role in the generation of ATP and NADPH | Play a role in the generation of ATP and NADPH
Contains protein complexes and cofactors that harvest and transfer light energy | Contains protein complexes and cofactors that harvest and transfer light energy
Require light as an energy source | Require light as an energy source
Contribute to the establishment of a proton gradient across the thylakoid membrane | Contribute to the establishment of a proton gradient across the thylakoid membrane
---------------- | ---------------
Location: thylakoid membrane | Location: thylakoid membrane
Function: participates in photosynthesis | Function: participates in photosynthesis
Contain chlorophyll a as a primary pigment | Contain chlorophyll a as a primary pigment
Involved in electron transport chain | Involved in electron transport chain
Contribute to the production of energy-rich compounds | Contribute to the production of energy-rich compounds
Essential for the conversion of light energy into chemical energy | Essential for the conversion of light energy into chemical energy
Play a role in the generation of ATP and NADPH | Play a role in the generation of ATP and NADPH
Contains protein complexes and cofactors that harvest and transfer light energy | Contains protein complexes and cofactors that harvest and transfer light energy
Require light as an energy source | Require light as an energy source
Contribute to the establishment of a proton gradient across the thylakoid membrane | Contribute to the establishment of a proton gradient across the thylakoid membrane
1 answer