What is the role of large bundle sheath cells found around the vascular bundles in C4 plants?
1.
To protect the vascular tissue from high light intensity.
2.
To provide the site for photorespiratory pathway.
3.
To increase the number of chloroplast for the operation of Calvin cycle.
4.
To enable the plant to tolerate high temperature.
Subtopic: Â Question on C4 Pathway |
From NCERT
NEET - 2022
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The products of light reaction in photosynthesis are:
| 1. | ATP, NADPH and \(\text{O}_2\) |
| 2. | ATP, NADPH, \(\text{O}_2\) and \(\text{H}_2 \text{O}\) |
| 3. | ATP, NADPH and \(\text{H}_2 \text{O}\) |
| 4. | ATP, NADPH and \(\text{CO}_2\) |
Subtopic: Â Light Reaction: Electron Transport |Â Light Reactions |
 79%
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NEET - 2022
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The ratio of carbon dioxide fixation between C4 plants and C3 plants is :
| 1. | 2:1 | 2. | 2: 3 |
| 3. | 1:1 | 4. | 1:2 |
Subtopic: Â Dark Reaction : Calvin Cycle |Â C4 Cycle (Hatch & Slack Pathway) |
 57%
From NCERT
NEET - 2022
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Which of the following is important to continue Calvin cycle in an uninterrupted manner?
| 1. | Oxidation of CO2 |
| 2. | Regeneration of the CO2 acceptor |
| 3. | Formation of hexose |
| 4. | Release of CO2 |
Subtopic: Â Dark Reaction : Calvin Cycle |
 88%
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In Kranz anatomy, the bundle sheath cells have :
1. Thick walls, no intercellular spaces and large number of chloroplasts
2. Thin walls, no intercellular spaces and several chloroplasts
3. Thick walls, many intercellular spaces and few chloroplasts
4. Thin walls, many intercellular spaced and no chloroplasts
1. Thick walls, no intercellular spaces and large number of chloroplasts
2. Thin walls, no intercellular spaces and several chloroplasts
3. Thick walls, many intercellular spaces and few chloroplasts
4. Thin walls, many intercellular spaced and no chloroplasts
Subtopic: Â C4 Cycle (Hatch & Slack Pathway) |
 88%
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C4 plants are photosynthetically more efficient than C3 plants because :
1. They have more chloroplasts
2. The CO2 compensation point is more
3. The CO2 efflux is not prevented
4. CO2 generated during photosynthesis is trapped and recycled through PEP-carboxylase
1. They have more chloroplasts
2. The CO2 compensation point is more
3. The CO2 efflux is not prevented
4. CO2 generated during photosynthesis is trapped and recycled through PEP-carboxylase
Subtopic: Â C4 Cycle (Hatch & Slack Pathway) |Â C4 Plants Examples |
 64%
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Experimental O2 entry in C4 - plants would inhibit CO2 fixation reactions in :
1. Bundle sheath cells
2. Mesophyll cells
3. Both (1) and (2)
4. Neither (1) nor (2)
1. Bundle sheath cells
2. Mesophyll cells
3. Both (1) and (2)
4. Neither (1) nor (2)
Subtopic: Â C4 Cycle (Hatch & Slack Pathway) |
 51%
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In C4 cycle, oxaloacetic acid further forms :
| 1. | Malic acid |
| 2. | Aspartic acid |
| 3. | Malic acid or aspartic acid |
| 4. | Succinic acid |
Subtopic: Â C4 Cycle (Hatch & Slack Pathway) |
 82%
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Properties of mesophyll cell and bundle sheath cells of a C4 plant is given below, Identify the missing properties marked as A, B, C and D.
| Mesophyll cell | Bundle sheath cell |
| Chloroplast granal | Chloroplast agranal |
| A | Only PS-I is present |
| B | C |
| Carboxylation occurs | D |
| 1. | A = Only PS-II present, B = Photolysis absent, C = Photolysis occurs, D = Carboxylation absent |
| 2. | A =Both PS-I and PS-II present, B = Contain more chloroplast, C = Contain less chloroplast, D = RuBisCo present |
| 3. | A = Both PS-I and PS-II present , B = Photolysis occurs, C = Photolysis absent, D = Carboxylation occurs |
| 4. | A = Lack both PS-I and PS-II, B = Contain less chloroplast, C = Contain more chloroplast, D = RuBisCo present |
Subtopic: Â C4 Cycle (Hatch & Slack Pathway) |
 51%
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If gene alterations cause the plant to be deficient in photorespiration, what would most probably occur?
| 1. | There would be more light induced damage to the cells |
| 2. | Less ATP would be generated |
| 3. | Less O2 would be produced |
| 4. | Photosynthetic efficiency would be reduced at low light intensites |
Subtopic: Â Photorespiration |
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