amani9087123
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Report Thread starter 4 years ago
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Does cyclic phosphorylation happen after non cyclic phosphorylation or at the same time?

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BeccAhhh
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Non-cyclic and cyclic photo-phosphorylation can occur simultaneously (just in different complexes at the same time). Cyclic photo-phosphorylation only uses photosystem I whereas non-cyclic photo-phosphorylation uses both photosystem I and photosystem II . Cyclic photo-phosphorylation may occur when the incident light has a wavelength of light which is greater than 680nm as photosystem II will no longer be activated as PS II only absorbs wavelengths of light up to 680nm. As such, only PS I will be activated and so only cyclic photophosphorylation will occur.
Basically it depends on the conditions as to whether cyclic or non cyclic will happen , there's no real order
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