- 1(current)
Q. No.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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The ions comprising the Oxygen Evolving Complex associated with PS II are:
| 1. | Manganese and Magnesium | 2. | Manganese and Calcium |
| 3. | Calcium and Iron | 4. | Magnesium and Iron |
Subtopic: Â Light Reaction: Electron Transport |
 56%
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The electrons excited to higher energy levels during photosynthesis belong to:
| 1. | Water | 2. | RuBP |
| 3. | glucose | 4. | chlorophyll |
Subtopic: Â Light Reaction: Electron Transport |
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In cyclic electron flow:
| 1. | the electron begins in a pigment complex called photosystem I, passes from the primary acceptor to ferredoxin and then to plastoquinone, then to cytochrome b6f, and then to plastocyanin before returning to chlorophyll. |
| 2. | the electron begins in a pigment complex called photosystem II, passes from the primary acceptor to ferredoxin and then to plastoquinone, then to cytochrome b6f, and then to plastocyanin before returning to chlorophyll. |
| 3. | the electron begins in a pigment complex called photosystem I, passes from the primary acceptor to ferredoxin and then to plastocyanin, then to cytochrome b6f, and then to plastoquinone before returning to chlorophyll. |
| 4. | the electron begins in a pigment complex called photosystem II, passes from the primary acceptor to ferredoxin and then to plastocyanin, then to cytochrome b6f, and then to plastoquinone before returning to chlorophyll. |
Subtopic: Â Light Reaction: Electron Transport |
 60%
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Identify the incorrect statement regarding non-cyclic photophosphorylation:
| 1. | Being a light reaction, non-cyclic photophosphorylation occurs in the thylakoid membrane. |
| 2. | The photosystem II complex replaces its lost electrons from an external source. |
| 3. | It generates both ATP and NADPH |
| 4. | When the chloroplast runs low on ATP for the Calvin cycle, the plant may shift from cyclic to non-cyclic electron flow. |
Subtopic: Â Light Reaction: Electron Transport |
 67%
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In the light dependent reactions of photosynthesis:
| 1. | NADPH is reduced to NADP+ by the enzyme NADP reductase |
| 2. | initial carbon fixation takes place forming a 3 carbon compound. |
| 3. | ATP is not produced. |
| 4. | light is absorbed and energy is transported to reaction-center chlorophyll a |
Subtopic: Â Light Reaction: Electron Transport |
 70%
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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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Light dependent reactions are so called because they require light:
| 1. | to provide electrons for the process |
| 2. | to split the water molecule |
| 3. | to impart energy to the electrons in the reaction center |
| 4. | to hydrolyse ATP molecules |
Subtopic: Â Light Reaction: Electron Transport |
 65%
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Hints
Identify the correct statement:
| 1. | The light reactions provide ATP and NADPH to the Calvin cycle. |
| 2. | The light reactions provide to the Calvin cycle. |
| 3. | The light reactions supply oxygen to the Calvin cycle. |
| 4. | Calvin cycle is in no way dependent on the light reactions. |
Subtopic: Â Light Reaction: Electron Transport |
 86%
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NEET 2026 - Target Batch - Vital
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- 1(current)
Q. No.
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