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Q. No.Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A):
Cyclic photophosphorylation results in the synthesis of ATP but not of NADPH + H+.
Reason (R):
The excited electron does not pass on to NADP+ but is cycled back to the PS I complex through the electron transport chain.
In the light of the above statements choose the correct answer from the options given below:
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 Reaction: Photophosphorylation |
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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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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 |
70%
From NCERT
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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 |
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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%
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%
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