Explain photophosphorilation
Asked by
| 30th Jul, 2008,
11:33: PM
The process of generating ATP from ADP by addition of one phosphate group in presence of light energy is called photophosphorylation. Photophosphorylation is carried out by means of a proton-motive force generated by the thylakoid membrane of the chloroplast. In light reaction, there are 2 pathways of photophosphorylation i.e. cyclic and non-cyclic.
During cyclic process, the high energy rich electron emitted from chlorophyll-a returns to chlorophyll-a, hence the name. Here only ATP is produced.
But in non-cyclic photophosphorylation, the high energy rich electron emitted by chlorophyll-a does not return to chlorophyll-a. Here both ATP and NADPH2 are produced.
Answered by
| 31st Jul, 2008,
10:22: AM
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