- 1(current)
Q. No.Which of the following correctly outlines the steps of the Z-scheme in photosynthesis?
| 1. | Light absorption, electron excitation, electron transport, ATP synthesis. |
| 2. | Carbon fixation, electron excitation, ATP synthesis, NADPH formation. |
| 3. | Electron excitation, light absorption, ATP synthesis, oxygen evolution. |
| 4. | ATP synthesis, light absorption, carbon fixation, electron transport. |
Subtopic: Â Light Reaction: Electron Transport |
 86%
From NCERT
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In the Z-scheme, transfer of electrons starts from:
| 1. | the PS II uphill to the acceptor, down the electron transport chain to PS I, transferred to another acceptor after excitation, and finally downhill to NADP+ reducing it to NADPH + H+. |
| 2. | the PS II downhill to the acceptor, down the electron transport chain to PS I, transferred to another acceptor after excitation, and finally uphill to NADP+ reducing it to NADPH + H+. |
| 3. | the PS I uphill to the acceptor, down the electron transport chain to PS II, transferred to another acceptor after excitation, and finally downhill to NADP+ reducing it to NADPH + H+. |
| 4. | the PS I downhill to the acceptor, down the electron transport chain to PS II, transferred to another acceptor after excitation, and finally uphill to NADP+ reducing it to NADPH + H+. |
Subtopic: Â Light Reaction: Electron Transport |
 82%
From NCERT
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Photosystem I is directly associated with:
| 1. | passing electrons to plastoquinone |
| 2. | receiving electrons from plastocyanin |
| 3. | P680 as the chlorophyll a reaction-center |
| 4. | removal of electrons and protons from water |
Subtopic: Â Light Reaction: Electron Transport |
 67%
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The extra ATP required [as compared to NADPH] in Calvin cycle comes from:
| 1. | photosystem II | 2. | photosystem I |
| 3. | cyclic electron flow | 4. | non cyclic electron flow |
Subtopic: Â Light Reaction: Electron Transport |Â Light Reaction: Photophosphorylation |
 58%
From NCERT
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The first step for initiation of photosynthesis will be
| 1. | Photolysis of water |
| 2. | Excitement of chlorophyll molecule due to absorption of light |
| 3. | ATP formation |
| 4. | Glucose formation |
Subtopic: Â Light Reaction: Electron Transport |
 78%
From NCERT
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Q. No.
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