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NEET UG BIOLOGY MCQ: PHOTOSYNTHESIS IN HIGHER PLANTS
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The following (I-IV) are the main steps of chemosynthetic ATP synthesis in the light reaction. Arrange them in correct order
I. concentration gradient established
II. diffuses through ATP synthetase
III. Carriers use energy from electrons to move across the membrane
IV. Electrons from PS-II pass along electron transport chain
V. Light excites electrons in PS-II
VI. Energy of flow is used by ATP synthetase to make ATP
I. concentration gradient established
II. diffuses through ATP synthetase
III. Carriers use energy from electrons to move across the membrane
IV. Electrons from PS-II pass along electron transport chain
V. Light excites electrons in PS-II
VI. Energy of flow is used by ATP synthetase to make ATP
View answer and explanation
Correct option: C
V, IV, III, I, II, VI
Option C (V, IV, III, I, II, VI) is correct because it represents the correct sequence of events in chemiosmotic ATP synthesis during the light reaction.
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I. When only PS I is functional, cyclic flow of electrons is not possible
II. The breakdown of the gradient provides enough to make the enzyme synthesis
III. The NADP reductase enzyme is located of the thylakoid membrane
IV. Proton gradient increases due to and Cyt . Law of limiting factors was given by