- 1(current)
Q. No.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%
Level 1: 80%+
NEET - 2016
Hints
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) |
80%
Level 1: 80%+
NEET - 2020
Hints
Bundle sheath cells:
| 1. | are rich in PEP carboxylase |
| 2. | lack RuBisCo |
| 3. | lack both RuBisCo and PEP carboxylase |
| 4. | are rich in RuBisCo |
Subtopic: Dark Reaction : Calvin Cycle | C4 Cycle (Hatch & Slack Pathway) |
78%
Level 2: 60%+
NEET - 2013
Hints
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 |
81%
Level 1: 80%+
NEET - 2021
Hints
Given below are two statements:
In the light of the above statements, choose the correct answer from the options given below :
| 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) |
82%
Level 1: 80%+
NEET - 2022
Hints
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
90%
Level 1: 80%+
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Hints
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C4 carbon fixation, one of three known photosynthetic processes of carbon fixation in plants, is also called as:
| 1. | Calvin Benson cycle |
| 2. | Tricarboxylic acid cycle |
| 3. | Hatch–Slack pathway |
| 4. | Embden-Meyerhof-Parnas pathway |
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
91%
Level 1: 80%+
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Hints
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In C4 plants:
| Statement I: | CO2 is initially incorporated into a four-carbon organic acid (either malate or aspartate) in the mesophyll cells. |
| Statement II: | The chloroplasts of the bundle sheath cells convert this CO2 into carbohydrates by the conventional C3 pathway. |
| 1. | Statement I is correct; Statement II is incorrect |
| 2. | Statement I is incorrect; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is correct; Statement II is correct |
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
68%
Level 2: 60%+
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Hints
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Consider the given two statements:
| Assertion (A): | Plants that do not use PEP-carboxylase in primary carbon fixation are called C3 plants. |
| Reason (R): | C3 plants are so called because, the primary carboxylation reaction, catalyzed by RuBisCO, produces the three-carbon 3-phosphoglyceric acids directly in the Calvin-Benson cycle. |
| 1. | (A) is True but (R) is False |
| 2. | Both (A) and (R) are True and (R) explains (A) |
| 3. | Both (A) and (R) are True but (R) does not explain (A) |
| 4. | (A) is False but (R) is True |
Subtopic: Dark Reaction : Calvin Cycle | C4 Cycle (Hatch & Slack Pathway) |
50%
Level 3: 35%-60%
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- 1(current)
Q. No.
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