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Q. No.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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Who discovered that plants in the presence of light produce a gas that supports combustion, which is part of the process of photosynthesis?
1. Jan Ingenhousz
2. Joseph Priestley
3. Melvin Calvin
4. Robin Hill
1. Jan Ingenhousz
2. Joseph Priestley
3. Melvin Calvin
4. Robin Hill
Subtopic: Historical View: Experiments |
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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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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 |
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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, 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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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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Consider the given two statements;
| Statement I: | The action spectrum of photosynthesis overlaps completely with the absorption spectrum of chlorophyll a. |
| Statement II: | Accessory pigments like chlorophyll b, xanthophylls, and carotenoids widen the range of light wavelengths that can be utilized for photosynthesis. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Pigments |
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Which of the following replaces the electrons removed from the reaction center chlorophyll-A molecule of the photosystem I in non-cyclic photophosphorylation?
1. The light harvesting complex of PS-I
2. Water
3. PS-II
4. NADPH
Subtopic: Light Reaction: Photophosphorylation |
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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 |
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