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Q. No.Identify the incorrect statement regarding photosynthesis in higher plants:
1.
Chlorophyll a is the chief pigment associated with photosynthesis.
2.
Splitting of water is associated with PS II
3.
Cyclic flow of electrons results only in the synthesis of NADH
4.
Biosynthetic phase is dependent on the products of the light reaction
Subtopic: Photosynthetic Pigments |
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Select the statements that will be true for C4 plants:
| I: | Calvin cycle takes place in Bundle sheath cells |
| II: | Number of carbon atoms in the primary carbon dioxide acceptor is 5 |
| III: | Initial carboxylation reaction occurs in mesophyll cells |
| IV: | Primary carbon dioxide fixation product is oxaloacetic acid |
| 1. | Only I, II and III | 2. | Only I, III and IV |
| 3. | Only II, III and IV | 4. | I, II, III and IV |
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
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From NCERT
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Which of the following is not a correct difference between a C3 and a C4 plant?
| Feature | C3 Plant | C4 Plant | |
| 1. | Cell type in which Calvin cycle takes place | Mesophyll cells | Bundle sheath cells |
| 2. | Cell type in which the initial carboxylation reaction occurs | Bundle sheath cells | Mesophyll cells |
| 3. | Primary carbon dioxide acceptor | RuBP | PEP |
| 4. | Number of carbons in the primary carbon dioxide fixation product | 5 | 3 |
Subtopic: C4 Cycle (Hatch & Slack Pathway) | CAM Pathway |
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Consider the following statements:
| I: | The reaction centre chlorophyll a in PS I is called P700 |
| II: | Oxygen evolving complex is associated with PS II |
| III. | Both ATP and NADPH are made during cyclic photophosphorylation |
| 1. | Only I and II are correct |
| 2. | Only I and III are correct |
| 3. | Only II and III are correct |
| 4. | I, II and III are correct |
Subtopic: Photosystems | Light Reaction: Electron Transport |
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Identify the option where the name of the scientist is not correctly matched with discovery related to understanding of the process of photosynthesis:
| 1. | Cornelius van Neil | Oxygen evolved comes from water |
| 2. | T W Engelmann | First absorption spectrum of chlorophyll a |
| 3. | Joseph Priestley | Plants restore to the air whatever breathing animals remove |
| 4. | Jan Ingenhousz | Sunlight is essential for photosynthesis |
Subtopic: Historical View: Experiments |
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What is not true regarding the factors affecting the rate of photosynthesis?
| 1. | There is a linear relationship between incident light and carbon dioxide fixation rates at low light intensities. |
| 2. | Current availability of carbon dioxide levels is limiting to the C4 plants. |
| 3. | C4 plants respond to higher temperatures and show higher rates of photosynthesis |
| 4. | Water stress causes the stomata to close, hence reducing the availability of carbon dioxide |
Subtopic: Factors Affecting Photosynthesis |
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Calvin cycle is described under three stages – I: Carboxylation; II: Reduction and III: Regeneration. ATP is required during stage/s:
| 1. | Only I | 2. | Only I and III |
| 3. | Only II and III | 4. | Only IV |
Subtopic: Dark Reaction : Calvin Cycle |
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Accessory pigments of photosynthesis in higher plants:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| I: | include chlorophyll b, xanthophylls and carotenoids. |
| II: | absorb light and transfer electrons to chlorophyll a. |
| III: | protect chlorophyll a from photo-oxidation. |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Pigments |
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In photosynthesis, energy from light reaction to dark reaction is transferred in the form of
| 1. ADP | 2. ATP |
| 3. RUDP | 4. Chlorophyll |
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For the synthesis of one glucose molecule, the Calvin cycle operates for:
| 1. 2 times | 2. 4 times |
| 3. 6 times | 4. 8 times |
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