Q. No.In photosynthesis, the light-independent reactions take place at
1. thylakoid lumen
2. photosystem l
3. photosystem ll
4. stromal matrix
Subtopic: Light Reactions :1 | Light Reactions |
70%
Level 2: 60%+
NEET - 2015
Hints
How many of the following statements are correct?
| i. | Products of dark reaction are substrates of light reaction. |
| ii. | Products of light reaction are substrates of dark reaction. |
| iii. | In the stroma, enzymatic reactions incorporate CO2 into the plant leading to the synthesis of sugar. |
| iv. | Dark reactions are directly light-driven. |
| v. | Chloroplast is a single membranous organelle. |
1. 2
2. 3
3. 4
4. 1
Subtopic: Dark Reaction: Biosynthetic Phase | Light Reactions :1 | Light Reactions |
66%
Level 2: 60%+
Hints
Which of the following is incorrect about the light reactions of photosynthesis?
| 1. | P680 and P700 are the reaction centres of PS-I and PS-II respectively |
| 2. | Light energy provides energy for the photolysis of water through excitation of the reaction centre of PS-II |
| 3. | NADPH is not produced in cyclic electrons transport in light reactions |
| 4. | Reactions of the two photosystems are needed for the reduction of NADP |
Subtopic: Light Reactions :3 | Light Reactions |
84%
Level 1: 80%+
AIIMS - 2016
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: Light Reactions :1 | Light Reactions :2 | Light Reactions |
81%
Level 1: 80%+
Hints
Light harvesting complexes are made up of-
1. proteins
2. pigments
3. protein and pigments
4. proteins and lipids.
Subtopic: Light Reactions :1 | Light Reactions |
75%
Level 2: 60%+
Hints
The reaction centre in PS II has an absorption maxima at:
| 1. | 780 nm | 2. | 680 nm |
| 3. | 700 nm | 4. | 660 nm |
Subtopic: Light Reactions |
90%
Level 1: 80%+
NEET - 2023
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: Light Reactions :2 | Light Reactions :3 | Light Reactions |
60%
Level 2: 60%+
Hints
Subtopic: Light Reactions :1 | Light Reactions :2 | 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: Light Reactions :1 | Light Reactions :2 | Light Reactions |
83%
Level 1: 80%+
Hints
Which of the following statement is incorrect?
| 1. | Electrons to PS-I are provided by PS-II |
| 2. | Electrons to PS-II are provided by the splitting of water |
| 3. | Electrons to PS-I are provided by the splitting of water |
| 4. | PS-II is physically located on the inner side of the membrane of the thylakoid. |
Subtopic: Light Reactions :3 | Light Reactions |
81%
Level 1: 80%+
Hints
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