Q. No.Given below are two statements:
In the light of the above statements, choose the correct answer from the option given below:
1. Both Statement I and Statement II are False
2. Statement I is True but Statement II is False
3. Statement I is False but Statement II is True
4. Both Statement I and Statement II are True
| Statement I: | In \(\text{C}_3\) plants, some \( \text{O}_2\) binds to \(\text{RuBisCO},\) hence \(\text{CO}_2\) fixation is decreased. |
| Statement II: | In \( \text{C}_4\) plants, mesophyll cells show very little photorespiration while bundle sheath cells do not show photorespiration. |
In the light of the above statements, choose the correct answer from the option given below:
1. Both Statement I and Statement II are False
2. Statement I is True but Statement II is False
3. Statement I is False but Statement II is True
4. Both Statement I and Statement II are True
Subtopic: Dark Reaction : Calvin Cycle | C4 Cycle (Hatch & Slack Pathway) | Photorespiration |
59%
From NCERT
NEET - 2024
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Hints
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Match List-I with List-II
Choose the correct answer from the options given below :
1. A-II, B-I, C-IV, D-III
2. A-IV, B-II, C-I, D-III
3. A-III, B-I, C-IV, D-II
4. A-III, B-IV, C-II, D-I
| List-I | List-II | ||
| A | C4 Pathway | I. | \(2\text{H}_2\text{O}\rightarrow4\text{H}^++\text{O}_2=4\text{e}^-\) |
| B. | Light reaction | II. | Ribulose 1,5-bisphosphate |
| C. | Photorespiration | III. | -carbon molecule phosphoenol |
| D. | Calvin cycle | IV. | Phosphoglycolate |
1. A-II, B-I, C-IV, D-III
2. A-IV, B-II, C-I, D-III
3. A-III, B-I, C-IV, D-II
4. A-III, B-IV, C-II, D-I
Subtopic: Photosystems | Dark Reaction : Calvin Cycle | C4 Cycle (Hatch & Slack Pathway) | Photorespiration |
81%
From NCERT
NEET - 2024
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Hints
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Given below are two statements:
In the light of the above statements, choose the correct answer from the options given below :
1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.
| Statement I: | The primary \(CO_2\) acceptor in \(C_4\) plants is phosphoenolpyruvate and is found in the mesophyll cells. |
| Statement II: | Mesophyll cells in \(C_4\) plants lack RuBisCO enzyme. |
1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
81%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
The first stable product of CO2 fixation in sorghum is:
1. Succinic acid
2. Phosphoglyceric acid
3. Pyruvic acid
4. Oxaloacetic acid
Subtopic: C4 Cycle (Hatch & Slack Pathway) | C4 Plants Examples |
79%
From NCERT
NEET - 2021
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
Which of the following statements is incorrect?
| 1. | RuBisCO is a bifunctional enzyme |
| 2. | In C4 plants, the site of RuBisCO activity is mesophyll cell |
| 3. | The substrate molecule for RuBisCO activity is a 5-carbon compound |
| 4. | RuBisCO action requires ATP and NADPH |
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
78%
From NCERT
NEET - 2020
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
In Hatch and Slack pathway, the primary CO2 acceptor is -
1. Oxaloacetic acid
2. Phosphoglyceric acid
3. Phosphoenol pyruvate
4. Rubisco
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
71%
From NCERT
NEET - 2019
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NEET 2025 - Target Batch
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Phosphoenol pyruvate (PEP) is the primary CO2 acceptor in:
1. C4 plants
2. C2 plants
3. C3 and C4 plants
4. C3 plants
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
83%
From NCERT
NEET - 2017
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilization. In which of the following physiological groups would you assign this plant?
| 1. | C4 | 2. | CAM |
| 3. | Nitrogen –fixer | 4. | C3 |
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
87%
From NCERT
NEET - 2016
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NEET 2025 - Target Batch
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In Kranz anatomy, the bundle sheath cells have:
| 1. | thick walls, many intercellular spaces and few chloroplasts |
| 2. | thin walls, many intercellular spaces and no chloroplasts |
| 3. | thick walls, no intercellular spaces and a large number of chloroplasts |
| 4. | thin walls, no intercellular spaces and several chloroplasts |
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
89%
From NCERT
AIPMT - 2011
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NEET 2025 - Target Batch
Hints
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NEET 2025 - Target Batch
Study the pathway given below:
In which of the following options, correct words for all the three blanks A, B and C are indicated?
| A | B | C | |
| 1. | Fixation | Transamination | Regeneration |
| 2. | Fixation | Decarboxylation | Regeneration |
| 3. | Carboxylation | Decarboxylation | Reduction |
| 4. | Decarboxylation | Reduction | Regeneration |
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
75%
From NCERT
AIPMT - 2010
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
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