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Q. No.In a photosystem:
1.
The reaction centre is where light is captured, while the antenna complex is where this light energy is transformed into chemical energy.
2.
The antenna complex is where light is captured, while the reaction centre is where this light energy is transformed into chemical energy.
3.
The antenna complex is where light energy is captured and transformed into chemical energy.
4.
The reaction centre is where light energy is captured and transformed into chemical energy.
Subtopic: Photosystems |
70%
From NCERT
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Given below are two statements:
| Assertion (A): | The reaction centres in both photosystems in plants is the same. |
| Reason (R): | The reaction centres of both photosystems are formed by chlorophyll b molecules. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Light Reactions :1 |
61%
From NCERT
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Consider the two statements:
| I: | The water-splitting complex is located on the inner side of the thylakoid membrane |
| II: | The NADP reductase enzyme is located on the stromal side of the thylakoid membrane |
| 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: Dark Reaction: Biosynthetic Phase |
77%
From NCERT
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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) |
74%
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 |
From NCERT
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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 |
79%
From NCERT
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Photosynthesis is important because:
| I: | It is the primary source of all food on earth. |
| II: | It is responsible for the release of oxygen into the atmosphere by green 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: Factors Affecting Photosynthesis |
94%
From NCERT
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The hypothesis “Plants restore to the air whatever breathing animals and burning candles remove” was given, after his experiments, by:
| 1. | Joseph Priestley | 2. | Jan Ingenhousz |
| 3. | Julius von Sachs | 4. | C. B. Van Neil |
Subtopic: Historical View: Experiments |
91%
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Who first showed that it is only the green parts of the plants that could release oxygen during photosynthesis?
| 1. | Joseph Priestley | 2. | Jan Ingenhousz |
| 3. | Julius von Sachs | 4. | C. B. Van Neil |
Subtopic: Historical View: Experiments |
73%
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Julius von Sachs provided evidence for:
Which of the following will be true in light of the information given above?
| I: | production of glucose when plants grow |
| II: | location of green substance in plants in special bodies |
| A: | Glucose produced during photosynthesis is usually stored as cellulose in plants. |
| B: | The ‘green substance’ refers to chlorophyll. |
| C: | ‘Special bodies’ refer to chloroplasts in the plant cells. |
| 1. | Only A and B | 2. | Only B and C |
| 3. | Only A | 4. | A, B and C |
Subtopic: Historical View: Experiments |
78%
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