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
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58 Comments

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  1. Anonymous18 April 2013 at 08:25

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

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  2. Anonymous18 November 2013 at 11:34

    grt notes

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  3. Anonymous30 November 2013 at 19:10

    this page is usefull when v need cmprehensive but short answers!!!!

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  4. Anonymous13 March 2014 at 11:26

    Thanks

    ReplyDelete
  5. Anonymous31 March 2014 at 23:00

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

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  6. Natalie H26 April 2014 at 12:20

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

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  7. Anonymous28 April 2014 at 05:21

    easy to make out and remember.

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  8. Anonymous30 May 2014 at 23:27

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

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  9. Anonymous9 July 2014 at 08:51

    NYC REWIEW AND CLEAR CONCEPTS!!

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  10. sani28 October 2014 at 09:13

    good points.

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  11. Anonymous5 November 2014 at 22:57

    This comment has been removed by a blog administrator.

    ReplyDelete
  12. Anonymous14 December 2014 at 09:01

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

    ReplyDelete
  13. Anonymous2 March 2015 at 09:30

    Very helpful

    ReplyDelete
  14. eli18 April 2015 at 23:32

    thanks!! awesome

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  15. Anonymous7 June 2015 at 20:59

    very short but informative,and quite useful for quick grasp

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  16. Anonymous6 July 2015 at 21:42

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

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  17. Anonymous12 October 2015 at 08:59

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

    ReplyDelete
  18. Anonymous27 October 2015 at 08:52

    Thanks.very much helpful

    ReplyDelete
  19. Anonymous29 October 2015 at 09:26

    Nice

    ReplyDelete
  20. Anonymous26 November 2015 at 04:54

    Soo helpful

    ReplyDelete
  21. Anonymous1 December 2015 at 07:17

    thank u
    simple and easy

    ReplyDelete
  22. Anonymous14 December 2015 at 06:15

    You blessedt my life with this. Thanks!

    ReplyDelete
  23. Unknown19 January 2016 at 03:15

    Very useful thnxxx

    ReplyDelete
  24. Anonymous22 January 2016 at 03:28

    Thank you! Keep up the great work.

    ReplyDelete
  25. Newsxction7 May 2016 at 23:07

    Very usefull points.

    ReplyDelete
  26. Unknown23 August 2016 at 20:10

    Simple and understandable ☺😊

    ReplyDelete
  27. Unknown23 August 2016 at 20:10

    Wow so simple and understandable ☺

    ReplyDelete
  28. Unknown27 September 2016 at 23:36

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

    ReplyDelete
  29. Raveendran Granjero9 December 2016 at 02:31

    In NON cyclic phosphorylation the NADP* is comes from where

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  30. Anonymous2 January 2017 at 10:04

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

    ReplyDelete
  31. Anonymous2 January 2017 at 10:06

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

    ReplyDelete
  32. Unknown16 January 2017 at 18:48

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

    ReplyDelete
  33. Unknown21 January 2017 at 22:23

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

    ReplyDelete
  34. Unknown10 February 2017 at 20:09

    Beautiful, very simply put

    ReplyDelete
  35. Anonymous15 February 2017 at 07:51

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

    ReplyDelete
  36. Anonymous15 February 2017 at 07:55

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

    ReplyDelete
  37. Anonymous22 February 2017 at 01:10

    Really helpful!

    ReplyDelete
  38. malijatakoyaki17 March 2017 at 05:12

    Good and fast note,thank you very much

    ReplyDelete
  39. interested learner10 April 2017 at 18:19

    very easy to understan

    ReplyDelete
  40. Anonymous6 May 2017 at 08:35

    Precise. Thanks a ton!

    ReplyDelete
  41. Paul Neligwa26 May 2017 at 05:54

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

    ReplyDelete
  42. Paul Neligwa26 May 2017 at 05:58

    Nicest it is understandable I like it

    ReplyDelete
  43. Unknown22 August 2017 at 08:53

    Thanks. Very useful material. Its great!

    ReplyDelete
  44. Shaikh Afzaal21 October 2017 at 19:18

    Great!!!!

    ReplyDelete
  45. Unknown25 October 2017 at 18:41

    Excellent way of explaining. Short and informative.

    ReplyDelete
  46. Anonymous2 November 2017 at 05:53

    Very helpful :)

    ReplyDelete
  47. Anonymous8 November 2017 at 07:24

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

    ReplyDelete
  48. Anonymous10 November 2017 at 21:31

    Thank you so much !

    ReplyDelete
  49. quiet27 November 2017 at 06:47

    Fantastic and just like spoon feed

    ReplyDelete
  50. Unknown13 December 2017 at 05:40

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

    ReplyDelete
  51. Unknown13 December 2017 at 05:40

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

    ReplyDelete
  52. Unknown14 December 2017 at 09:20

    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?

    ReplyDelete
  53. Anonymous4 January 2018 at 20:46

    thanku

    ReplyDelete
  54. Disha7 February 2018 at 22:33

    Much helpful
    Thnkxx..✌��

    ReplyDelete
  55. Unknown4 March 2018 at 10:17

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

    ReplyDelete
  56. Anonymous11 June 2018 at 10:36

    Thes notes is very easy to understand...thank you

    ReplyDelete
  57. Unknown23 August 2018 at 03:53

    this helped me

    ReplyDelete
  58. Unknown16 September 2018 at 19:17

    it's good
    Thanks

    ReplyDelete

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