In a hypothetical condition, if the thylakoid membrane tears off causing the lumen of thylakoid continuous with the stroma, which of the following processes is likely to be most affected?
1.
Reduction of NADP+ to NADPH
2.
Absorption of sunlight by chloroplast
3.
Movement of electrons from PS II to PS I
4.
ATP synthesis
Subtopic: Chemiosmotic hypothesis |
67%
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In C4 plants, bundle sheath cells
| 1. | Are rich in RuBisCo enzyme |
| 2. | Are rich in PEP case enzyme |
| 3. | Are not the sites of Calvin cycle |
| 4. | Are not the sites of release of CO2 |
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
86%
From NCERT
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Mark the incorrect statement w.r.t. C4 plants
| 1. | They have a special type of leaf anatomy. |
| 2. | They can tolerate higher temperatures. |
| 3. | They lack a wasteful process called photorespiration |
| 4. | They show lower productivity and minimum yield as compared to the C3 plants. |
Subtopic: C4 Cycle (Hatch & Slack Pathway) | C4 Plants Examples |
91%
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Kranz anatomy is not characterised by the presence of:
1. Bundle sheath
2. Palisade mesophyll
3. Spongy mesophyll
4. Stomata
1. Bundle sheath
2. Palisade mesophyll
3. Spongy mesophyll
4. Stomata
Subtopic: C4 Cycle (Hatch & Slack Pathway) | C4 Plants Examples |
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Kranz anatomy is found in?
| 1. | C3 plants |
| 2. | only in monocots |
| 3. | Both C4 and C3 plants |
| 4. | C4 plant |
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
93%
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Subtopic: Pigments |
61%
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Herbicide that blocks electron transport from PS -II to PS-I by inhibiting electron flow between plastoquinone cytochrome is:
1. DCMU
2. Paraquat
3. DCPIP
4. None of these
1. DCMU
2. Paraquat
3. DCPIP
4. None of these
Subtopic: Light Reaction: Electron Transport |
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A plant is provided with ideal conditions for photosynthesis and supplied with isotope 14CO2 . When the products of the process are analysed carefully, what would be the nature of products?
| 1. | Glucose and oxygen are labelled |
| 2. | Oxygen is labelled, but glucose is normal |
| 3. | Glucose and oxygen are normal. |
| 4. | Glucose is labelled, but oxygen is normal |
Subtopic: Historical View: Experiments |
70%
From NCERT
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Fixation of one CO2, molecule through Calvin cycle requires:
| 1. | 1 ATP and 2 NADPH2 |
| 2. | 2 ATP and 2 NADPH2 |
| 3. | 3 ATP and 2 NADPH2 |
| 4. | 2 ATP and 1 NADPH2 |
Subtopic: Dark Reaction : Calvin Cycle |
87%
From NCERT
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Molecular formula of chlorophyll-b is
| 1. | \(\mathrm{C}_{55} \mathrm{H}_{70} \mathrm{O}_6 \mathrm{~N}_4 \mathrm{Mg}\) |
| 2. | \(\mathrm{C}_{55} \mathrm{H}_{72} \mathrm{O}_5 \mathrm{~N}_4 \mathrm{Mg}\) |
| 3. | \(\mathrm{C}_{55} \mathrm{H}_{70} \mathrm{O}_5 \mathrm{~N}_4 \mathrm{Mg}\) |
| 4. | \(\mathrm{C}_{54} \mathrm{H}_{70} \mathrm{O}_6 \mathrm{~N}_4 \mathrm{Mg}\) |
Subtopic: Chloroplast Structure |
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