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Q. No.The number of molecules of NADPH and ATP required respectively to reduce six molecules of carbon dioxide to glucose in Calvin cycle?
1.
6 and 6
2.
12 and 12
3.
12 and 18
4.
18 and 12
Subtopic: Dark Reaction : Calvin Cycle |
79%
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: 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: Light Reaction: Electron Transport | Light Reaction: Photophosphorylation |
58%
From NCERT
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In chloroplasts, protons are actively pumped from
| 1. | the intermembrane space to the matrix. |
| 2. | the matrix to the stroma. |
| 3. | the stroma to the thylakoid space. |
| 4. | the thylakoid space to the intermembrane space. |
Subtopic: Chemiosmotic hypothesis |
62%
From NCERT
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For the synthesis of glucose, the source of hydrogen atoms is:
| 1. | Water | 2. | NADPH |
| 3. | FADH2 | 4. | Monosaccharides |
Subtopic: Dark Reaction: Biosynthetic Phase |
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If chloroplasts are illuminated with sunlight, the lowest pH would be observed in:
| 1. | stroma | 2. | intermembrane space |
| 3. | thylakoid space | 4. | cytosol |
Subtopic: Chemiosmotic hypothesis |
74%
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Identify the correct statement:
| 1. | The pH within the thylakoid is less than that of the stroma. |
| 2. | The pH of the stroma is higher than that of the other two measurements. |
| 3. | The pH of the stroma is higher than that of the thylakoid space but lower than that of the cytosol. |
| 4. | The pH of the thylakoid space is higher than that observed anywhere else in the cell. |
Subtopic: Chemiosmotic hypothesis |
75%
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Radioactive carbon [] was fed to a plant during the day and after a short time was traced to oxaloacetate. The plant used in the experiment will be:
| 1. | C4 plant | 2. | C3 plant |
| 3. | CAM plant | 4. | carnivorous plant |
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
82%
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Identify the correctly matched rows:
| C3 | C4 | ||
| I: | Productivity | Low | High |
| II: | CO2 compensation point | Low | Low |
| III: | Temperature optimum | 20 – 25º C | 30 – 45º C |
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
Subtopic: C4 Plants Examples |
79%
From NCERT
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The most common enzyme in the world is:
1. PEP carboxylase
2. Pyruvate dehydrogenase
3. RuBisCO
4. Collagenase
1. PEP carboxylase
2. Pyruvate dehydrogenase
3. RuBisCO
4. Collagenase
Subtopic: Dark Reaction : Calvin Cycle |
96%
From NCERT
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