What is Chemiosmotic hypothesis??
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Posted by Arun Venkateshwaran 7 years, 3 months ago
- 2 answers
Yogita Ingle 7 years, 3 months ago
- Chemiosmotic hypothesis explain the mechanism of ATP synthesis in chloroplast.
- In photosynthesis, ATP synthesis is linked to development of a proton gradient across a membrane.
- The protons that are produced by the splitting of water are accumulated inside of membrane of thylakoids (in lumen).
- As the electron moves through the photosystem, protons are transported across the membrane.
- NADP reductase enzyme is located on the stroma side of the membrane, along with electrons from the acceptor it removes H+ from the stroma during reduction of NADPH + H+.
- This creates proton gradients across the thylakoid membrane as well as a measurable decrease in pH in the lumen.
- ATPase has a channel that allows diffusion of protons back to stroma across the membrane.
- This releases energy to activate ATPase enzyme that catalyses the formation of ATP.
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Arun Venkateshwaran 7 years, 3 months ago
0Thank You