HSC Science (General) 12th Board ExamMaharashtra State Board
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Solution - Differentiate Between Cyclic and Non-cyclic Photophosphorylation. - HSC Science (General) 12th Board Exam - Biology

ConceptElectron Transport - Cyclic and Non-cyclic Photo-phosphorylation


Differentiate between cyclic and non-cyclic photophosphorylation.


Non-cyclic photophosphorylation Cyclic photophosphorylation
1. Both photosystems I and II are involved. 1. Only photosystem I is involved.
2. The electron given out by PS-II does return back to it, but is used up by PS-I 2. The electron given out by PS-I returns back
3. It is associated with photolysis of water and liberation of oxygen. 3. It is not associated with photolysis of water, and so, oxygen is not liberated.
4. It involves ATP synthesis and production of NADPH. 4. It involves only ATP synthesis.
5. It takes place under optimum light, aerobic conditions and the presence of CO2. 5. It takes place under low light intensity, anaerobic conditions or when CO2 availability is less.
6. It is concerned with CO2 fixation in all plants 6. It does not participate in photosynthesis except in some bacteria and C4 plants.
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 2015-2016 (March) (with solutions)
Question 3.1.3 | 3 marks

Reference Material

Solution for question: Differentiate Between Cyclic and Non-cyclic Photophosphorylation. concept: null - Electron Transport - Cyclic and Non-cyclic Photo-phosphorylation. For the course HSC Science (General)