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Q. No.Identify the incorrect statement regarding photosynthetic pigments in higher plants:
1.
Chlorophyll a is the chief pigment associated with photosynthesis.
2.
In the chromatogram, carotenoids appear yellow to yellow-orange.
3.
Accessory pigments protect chlorophyll a from photo-oxidation.
4.
The maximum absorption of chlorophyll a is in blue and green wavelength region of light.
Subtopic: Photosynthetic Pigments |
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Consider the two statements:
| I: | Current availability of carbon dioxide levels is limiting to the C4 plants. |
| II: | C3 plants have a much lower temperature optimum than C4 plants. |
| 1. | Only I is correct | 2. | Only II is correct |
| 3. | Both I and II are correct | 4. | Both I and II are incorrect |
Subtopic: C4 Cycle (Hatch & Slack Pathway) | C4 Plants Examples | Factors Affecting Photosynthesis |
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From NCERT
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Match the Scientists given in COLUMN I with their contribution in Column II and select the correct match from the codes given:
Codes
| COLUMN I | COLUMN II | ||
| A | Jan Ingenhousz | P | Provided evidence for production of glucose when plants grow |
| B | T. W Engelmann | Q | Described the first action spectrum for photosynthesis |
| C | Julius von Sachs | R | Showed that sunlight is essential for photosynthesis |
| D | Cornelius van Neil | S | Inferred that oxygen evolved in photosynthesis comes from water and not from carbon dioxide |
| A | B | C | D | |
| 1. | R | Q | P | S |
| 2. | Q | R | S | P |
| 3. | P | S | R | Q |
| 4. | S | P | Q | R |
Subtopic: Introduction | Historical View: Experiments |
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From NCERT
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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 |
From NCERT
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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 |
73%
From NCERT
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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 |
89%
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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 |
83%
From NCERT
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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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