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Q. No.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 |
Level 4: Below 35%
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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) |
Level 3: 35%-60%
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Consider the following two statements:
| I. | Plants with C3 pathway have a single type of photosynthetic cell: the mesophyll cell. |
| II. | Their bundle sheath cells do not contain chloroplasts. |
| 1. | Both I and II are correct |
| 2. | Only I is correct |
| 3. | Only II is correct |
| 4. | Both I and II are incorrect |
Subtopic: Dark Reaction : Calvin Cycle |
Level 3: 35%-60%
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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 |
72%
Level 2: 60%+
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Match each item in Column-I with the one in Column-II regarding C4 plants and select the correct match from the codes given:
Codes:
| Column-I | Column-II | ||
| A. | Primary acceptor of carbon dioxide | P. | RuBP |
| B. | Cells in which Calvin cycle takes place | Q. | PEP |
| C. | Primary carbon dioxide fixation product | R. | Bundle sheath |
| D. | Example | S. | Mesophyll |
| T. | PGA | ||
| U. | OAA | ||
| V. | Sorghum | ||
| W. | Wheat |
| A | B | C | D | |
| 1. | Q | S | U | V |
| 2. | P | S | T | W |
| 3. | Q | R | U | V |
| 4. | P | R | T | W |
Subtopic: C4 Cycle (Hatch & Slack Pathway) | C4 Plants Examples |
74%
Level 2: 60%+
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements choose the correct answer from the options given below:
| 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. |
| 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 |
84%
Level 1: 80%+
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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 |
64%
Level 2: 60%+
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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 |
81%
Level 1: 80%+
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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 |
76%
Level 2: 60%+
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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 |
63%
Level 2: 60%+
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