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Q. No.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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Level 3: 35%-60%
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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 |
52%
Level 3: 35%-60%
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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 |
70%
Level 2: 60%+
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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 |
Level 3: 35%-60%
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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 |
Level 3: 35%-60%
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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 |
Level 3: 35%-60%
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The limiting factor of photosynthesis which is most likely to have the greatest effect on plants that are grown in an open field during a hot summer day will be:
1. Carbon dioxide concentration
2. Light intensity
3. Temperature
4. Water
1. Carbon dioxide concentration
2. Light intensity
3. Temperature
4. Water
Subtopic: Factors Affecting Photosynthesis |
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During 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: | carbon dioxide is reduced. |
| II: | oxygen is released. |
| III: | the hydrogen carrier is NAD. |
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: Introduction | Photosynthetic Pigments | Light Reaction: Electron Transport | Dark Reaction: Biosynthetic Phase |
58%
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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 |
Level 3: 35%-60%
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Consider the given two statements:
| Assertion (A): | The effect of water as a factor is more indirect rather than direct on photosynthesis. |
| Reason (R): | Water is one of the reactants in the light 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: Factors Affecting Photosynthesis |
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Level 2: 60%+
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