Following is needed in the ionic form during non-cyclic photophosphorylation but not during cyclic photophosphorylations in higher plants.
| 1. | copper | 2. | iron |
| 3. | manganese | 4. | zinc |
Subtopic: Â Light Reactions :1 |Â Light Reactions :2 |Â Light Reactions |
 65%
Level 2: 60%+
Hints
Production of NADPH in a chloroplast takes place during
1. cyclic photophosphorylation
2. non-cyclic photophosphorylation
3. series photophosphorylation
4. substrate level photophosphorylation.
Subtopic: Â Light Reactions :2 |Â Light Reactions |
 88%
Level 1: 80%+
Hints
Subtopic: Â Light Reactions :2 |Â Light Reactions :3 |Â Light Reactions |
 79%
Level 2: 60%+
AIIMS - 2010
Hints
Which of the following statement is incorrect?
| 1. | Reaction centre is formed by a group of chl- a molecules. |
| 2. | Reaction centre is different in both the photosystems. |
| 3. | In PS I the reaction centre chlorophyll a has an absorption peak at 700 nm. |
| 4. | In PS II the reaction centre chlorophyll a has absorption maxima at 680 nm. |
Subtopic: Â Light Reactions :1 |Â Light Reactions :2 |Â Light Reactions |
 60%
Level 2: 60%+
Hints
In photosystem-I, P700 refers to-
| 1. | chl-b |
| 2. | chl-a |
| 3. | number of pigment molecules |
| 4. | absorption peak of chl-a at 700nm. |
Subtopic: Â Light Reactions :1 |Â Light Reactions :2 |Â Light Reactions |
 81%
Level 1: 80%+
Hints
In chloroplast the movement of electrons from PS-II to electron transport system is-
| 1. | uphill in terms of redox potential scale. |
| 2. | downhill in terms of redox potential scale. |
| 3. | from one cytochrome to another |
| 4. | None of the above. |
Subtopic: Â Light Reactions :2 |Â Light Reactions :3 |Â Light Reactions |
 60%
Level 2: 60%+
Hints
Unlock IMPORTANT QUESTION
This question was bookmarked by 5 NEET 2025 toppers during their NEETprep journey. Get Target Batch to see this question.
✨ Perfect for quick revision & accuracy boost
Buy Target Batch
Access all premium questions instantly
Electrons in the reaction center of PS-I are excited by-
| 1. | blue light | 2. | red light |
| 3. | green light | 4. | blue and red light. |
Subtopic: Â Light Reactions :1 |Â Light Reactions :2 |Â Light Reactions |
 50%
Level 3: 35%-60%
Hints
Subtopic: Â Light Reactions :1 |Â Light Reactions :2 |Â Light Reactions |
 69%
Level 2: 60%+
Hints
In the Z-scheme of light reaction, at how many positions an electron is excited by the light?
1. 1
2. 2
3. 3
4. 4
Subtopic: Â Light Reactions :1 |Â Light Reactions :2 |Â Light Reactions |
 83%
Level 1: 80%+
Hints
Which statement describes the functioning of photosystem II?
| 1. | Light energy excites electrons in the thylakoid membrane electron transport chain. |
| 2. | Photons are passed along to a reaction-center chlorophyll. |
| 3. | The P680 chlorophyll donates a pair of protons to NADP+, which is thus converted to NADPH. |
| 4. | The electron vacancies in P680+ are filled by electrons derived from water. |
Subtopic: Â Light Reaction: Electron Transport |Â Light Reactions :1 |Â Light Reactions :2 |
 58%
Level 3: 35%-60%
Please attempt this question first.
Hints
Please attempt this question first.
© 2026 GoodEd Technologies Pvt. Ltd.