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Q. No.Accessory pigments of photosynthesis in higher plants:
I:
include chlorophyll b, xanthophylls and carotenoids.
II:
absorb light and transfer electrons to chlorophyll a.
III:
protect chlorophyll a from photo-oxidation.
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: Pigments |
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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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From NCERT
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Identify the incorrect match:
| C3 plants | C4 plants | ||
| 1. | Primary carbon dioxide acceptor | RuBP | PEP |
| 2. | Primary carbon dioxide fixation product | PGA | OAA |
| 3. | Presence of PEPcase | Yes | Yes |
| 4. | Cell type in which initial carboxylation reaction occurs | Mesophyll | Bundle sheath |
Subtopic: Dark Reaction : Calvin Cycle | C4 Cycle (Hatch & Slack Pathway) |
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Consider the given two statements:
| I: | The oxygenation reaction of RuBisCO is a wasteful process. |
| II: | 3-phosphoglycerate is not created. |
| 1. | Both I and II are correct and II explains I |
| 2. | I is correct but II is incorrect |
| 3. | Both I and II are correct but II does not explain I |
| 4. | I is incorrect but II is correct |
Subtopic: Photorespiration |
From NCERT
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Given below are two statements:
| Assertion (A): | At any point, the rate of photosynthesis will be determined by the factor available at sub-optimal levels. |
| Reason (R): | During photosynthesis, usually one factor affecting CO2 fixation is the major cause that limits its rate. |
| 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: Factors Affecting Photosynthesis |
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From NCERT
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In the experiment conducted by T.W. Engelmann aerobic bacteria were used.
| 1. | To determine the action spectrum |
| 2. | To determine the absorption spectrum of chlorophyll. |
| 3. | To detect the sites of oxygen (O2) evolution. |
| 4. | To detect the oxidizing species in the photosynthetic reactants. |
Subtopic: Historical View: Experiments |
From NCERT
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In photosynthesis, what occurs in PS-II?
| 1. | It absorbs longer wavelength of light and e- from H2O |
| 2. | It absorbs shorter wavelength of light and e- from H2O |
| 3. | It absorbs longer wavelength of light and e- from NADP |
| 4. | It absorbs shorter wavelength of light and e- from NADP |
Subtopic: Photosynthetic Pigments |
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From NCERT
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Identify the correct statements:
| I: | Only green plants can prepare their own food. |
| II: | In green plants, all cells, tissues and organs photosynthesise. |
| 1. | Only I |
| 2. | Only II |
| 3. | Both I and II |
| 4. | Neither I nor II |
Subtopic: Introduction | Historical View: Experiments | Pigments |
From NCERT
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Consider the given two statements:
| Assertion (A): | Water molecules appear on both sides of the equation of photosynthesis. |
| Reason (R): | The molecules that enter the reaction are not the same molecules that emerge from the reaction. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False |
Subtopic: Light Reaction: Photophosphorylation | Light Reactions :1 | Light Reactions :2 | Light Reactions :3 |
From NCERT
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The colour/s of visible light that work/s least well for photosynthesis is/are:
1. Red and Blue
2. Violet and Yellow
3. Green
4. Yellow
1. Red and Blue
2. Violet and Yellow
3. Green
4. Yellow
Subtopic: Pigments |
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