Bundle sheath cells, part of Kranz anatomy in a C4 plant, are not characterized by:
1. May form several layers around the vascular bundle
2. Have large number of chloroplasts
3. Have thick walls impervious to gaseous exchange
4. Large intercellular spaces are seen
Subtopic: Â C4 Cycle (Hatch & Slack Pathway) |
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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: Â Introduction |Â Historical View: Experiments |
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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: Â Pigments |
From NCERT
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What provides the electrons needed to replace those removed from photosystem II during non cyclic photophosphorylation?
| 1. | PS I | 2. | Oxygen |
| 3. | Water | 4. | Carbon dioxide |
Subtopic: Â Light Reaction: Electron Transport |
 85%
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The reducing power used in Calvin cycle for reduction of carbon dioxide is:
| 1. | NADH | 2. | NADPH |
| 3. | ATP | 4. | Water |
Subtopic: Â Dark Reaction : Calvin Cycle |
 65%
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When the ratio of carbon dioxide and oxygen in the vicinity of RuBisCO is 1, the affinity of the enzyme:
1. is nearly nil for oxygen
2. is about equal for both carbon dioxide and oxygen
3. is much greater for oxygen than carbon dioxide
4. is much greater for carbon dioxide than oxygen
1. is nearly nil for oxygen
2. is about equal for both carbon dioxide and oxygen
3. is much greater for oxygen than carbon dioxide
4. is much greater for carbon dioxide than oxygen
Subtopic: Â C4 Cycle (Hatch & Slack Pathway) |
 61%
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T.W. Engelmann:
| 1. | described a first action spectrum of photosynthesis |
| 2. | provided evidence for production of glucose when plants grow |
| 3. | showed that it is only the green parts of the plant that can release oxygen |
| 4. | first showed that oxygen evolved by the green plant comes from water, not from carbon dioxide |
Subtopic: Â Historical View: Experiments |
 89%
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In non-cyclic photo-phosphorylation:
| 1. | only PS I is functional |
| 2. | both photosystems work in series, first PS I and then PS II |
| 3. | only ATP synthesis takes place and NADPH is not synthesized |
| 4. | both ATP and NADPH are synthesized |
Subtopic: Â Light Reaction: Electron Transport |
 76%
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In Sorghum:
| 1. | Calvin cycle takes place in Mesophyll cells |
| 2. | Initial carboxylation reaction occurs in Bundle sheath cells |
| 3. | Number of carbon atoms in the primary carbon dioxide acceptor is 3 |
| 4. | PGA is the primary carbon dioxide fixation product |
Subtopic: Â C4 Cycle (Hatch & Slack Pathway) |Â C4 Plants Examples |
 63%
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Subtopic: Â Light Reaction: Electron Transport |
 81%
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