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Difference Between Cyclic and Non Cyclic Photophosphorylation

Photosynthesis is the process of producing carbohydrates by green plants using CO2 and H2O in the presence of sunlight.

It is a two-step process light reaction and dark reaction
  • Light reaction takes place in the grana of the chloroplast where light energy is converted to chemical energy as ATP and NADPH
  • In dark reaction, the energy produced in the light reaction is utilized to fix CO2 to carbohydrates. The location of dark reaction is stroma of the chloroplast
Cyclic photophosphorylation vs Non Cyclic photophosphorylation
Photophosphorylation
In light reaction, addition of phosphate in the presence of light is called photophosphorylation.

Cyclic photophosphorylation The photophosphorylation occurring an cyclic electron transport called cyclic photophosphorylation



1. Only photosystem I is involved

2. The active reaction centre is P700

3. Electrons travels in a cyclic manner

4. Electron travels back to PS I

5. Only ATP is produced

6. Photolysis or water splitting is absent

7. Oxygen is not evolved

8. The system is predominant in bacteria

Non-Cyclic photophosphorylation The photophosphorylation occurring a non-cyclic electron transport is called non cyclic photophosphorylation.


1. Both photosystem I and II are involved

2. The active reaction centre is P680

3. Electrons travels in a non-cyclic manner

4. Electron from PS I is accepted by NADP

5. Both ATP and NADPH are produced

6. Photolysis or water splitting is present

7. Oxygen is evolved as a by-product

8. The system is predominant in green plants

55 comments:

  1. Simple, straight forward and educational. Well done, this really helped me! :)

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  3. Thank you so much, big tests with little review call for notes like these... Everyone should simplify notes this way!

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  4. This is very clear and concise. Thank you! :)

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  5. easy to make out and remember.

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  6. great! found it very useful and simple, thank you)

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  7. NYC REWIEW AND CLEAR CONCEPTS!!

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  8. This comment has been removed by a blog administrator.

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  9. SUPERB !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! GREAT !!!!!!!!!!!!!! LIKE A PIECE OF CAKE!!!!!!!!!!

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  10. very short but informative,and quite useful for quick grasp

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  11. is there any difference in the site of cyclic and non-cyclic photophosphorylation?

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  12. Great, simple and to the point. Excellent for a quick understanding of whats going on.

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  13. Thanks.very much helpful

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  14. thank u
    simple and easy

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  15. You blessedt my life with this. Thanks!

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  16. Thank you! Keep up the great work.

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  17. Simple and understandable ☺😊

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  18. Wow so simple and understandable ☺

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  19. It is an excellent short note.Indeed helpful. Thanks a lot.

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  20. In NON cyclic phosphorylation the NADP* is comes from where

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  21. Simple, very understandable.
    Exactly what I looking for.thanx alot

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  22. Simple,very understandable.
    Exactly what I looking for.thanxalot.

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  23. very much understandable even for low caliber students...well described.

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  24. Thank you.. It was the most effective explanation I had till now..

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  25. good one ... explained very well .��������

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  26. well explained . easy to understand and very helpful ��☺

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  27. Really helpful!

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  28. Good and fast note,thank you very much

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  29. Precise. Thanks a ton!

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  30. Nicest!! It is understandreble I like it!!!

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  31. Nicest it is understandable I like it

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  32. Thanks. Very useful material. Its great!

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  33. Excellent way of explaining. Short and informative.

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  34. Very helpful :)

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  35. Oh my god it is good n simple������

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  36. Thank you so much !

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  37. Fantastic and just like spoon feed

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  38. Ur answer was like a cake walk kor remember me ...... Great

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  39. Ur answer was like a cake walk kor remember me ...... Great

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  40. Very well presented and makes things very easy to study! But can somebody answer this? ATP is a very unstable compound and needs to be used up almost immediately after it is produced. Given that, how do organisms performing cyclic photosynthesis survive overnight?

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  41. Much helpful
    Thnkxx..✌��

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  42. This is very useful. Thank you for these concise, clear differences

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