Difference between oxidative phosphorylation and photophosphorylation.
1. In OP, NADH is electron donor whereas in PP water is electron donor.
2. In OP, oxygen is converted to water but in PP, water is converted to oxygen.
3. In PP, photons are required but in OP they are not required.
4. The reason for the need of photons is that water has a very low oxidation potential (-0.82 V) and therefore cannot liberate electron without additional energy. On the other hand, NADH has pretty high oxidation potential (-0.32 V) and therfore can give electrons.
Photosynthesis happens in thylakoids. The fluid surrounded by thylakoid membrane is known as lumen. Membranes of thylakoids is known as lammeli. The aqueous phase outside thylakoid but surrounded by inner membrane is known as stroma. Stroma is site of carbon assimilation reaction.
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3 comments:
1. Sir, how oxidation potential is related with give and take of electrons?
Oxidation potential is a measurement of the tendency of giving electrons.
Lower the oxidation potential, lower is the tendency.
Sir, the standard oxidation potential of NADH is +0.32V and not -0.32V.
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