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Q. No.The correct and complete equation for the process of photosynthesis in higher plants will be:
1.
6CO2 + 12H2O + light energy → C6H12O6 + 6O2+ 6H2O
2.
6CO2 + 6H2O + light energy → C6H12O6 + 6O2
3.
CO2 + H2O + light energy → [CH2O] + O2
4.
C6H12O6 + 6O2 → 6CO2 + 6H2O
Subtopic: Historical View: Experiments |
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Consider the given two statements:
| I: | Carbon reactions during photosynthesis in higher plants are called as dark reactions. |
| II: | They occur in darkness and they are not light-dependent. |
| 1. | Both I and II are correct and II explains I |
| 2. | Both I and II are correct but II does not explain I |
| 3. | I is correct but II is incorrect |
| 4. | I is incorrect but II is correct |
Subtopic: Dark Reaction: Biosynthetic Phase | Dark Reaction : Calvin Cycle |
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The accessory pigments of photosynthesis:
1. Only I and II are correct
2. Only I and III are correct
3. I, II and III are correct
4. Only II and III are correct
| I: | include Carotenoids and Xanthophylls but not Chlorophyll b. |
| II: | enable a wider range of wavelength of incoming light to be utilised for photosynthesis. |
| III: | protect Chlorophyll a from photo-oxidation. |
1. Only I and II are correct
2. Only I and III are correct
3. I, II and III are correct
4. Only II and III are correct
Subtopic: Pigments |
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Match each item in Column I with one in Column II and select the correct match from the codes given:
Codes
| Column I | Column II | ||
| A. | Chlorophyll a | P. | Bright or blue-green |
| B. | Chlorophyll b | Q. | Yellow-green |
| C. | Xanthophylls | R. | Yellow |
| D. | Carotenoids | S. | Yellow to yellow-orange |
| A | B | C | D | |
| 1. | P | Q | R | S |
| 2. | Q | R | S | P |
| 3. | R | S | P | Q |
| 4. | S | P | Q | R |
Subtopic: Pigments |
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Consider the given two statements:
| Statement I: | When only PS I is functional, the electron is circulated within the photosystem and the phosphorylation occurs due to cyclic flow of electrons. |
| Statement II: | Cyclic photophosphorylation also occurs when only light of wavelengths beyond 680 nm are available for excitation. |
| 1. | Both Statement I and Statement II are correct |
| 2. | Both Statement I and Statement II are incorrect |
| 3. | Statement I is correct but Statement II is incorrect |
| 4. | Statement I is incorrect but Statement II is correct |
Subtopic: Light Reaction: Electron Transport |
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Regarding the thylakoid membrane:
| I: | Plastoquinone is located within the membrane |
| II: | Plastocyanin is located on the inner lumen side of the membrane |
| III: | NADP reductase is located on the stroma side of the membrane |
| 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 |
Subtopic: Chemiosmotic hypothesis |
63%
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Consider the given two statements:
| Statement I: | CF1 particle of ATP synthase makes ATP molecules. |
| Statement II: | CF1 particle of ATP synthase is embedded in the thylakoid membrane and forms a transmembrane channel that carries out facilitated diffusion of protons across the membrane. |
| 1. | Both Statement I and Statement II are correct |
| 2. | Both Statement I and Statement II are incorrect |
| 3. | Statement I is correct but Statement II is incorrect |
| 4. | Statement I is incorrect but Statement II is correct |
Subtopic: Chemiosmotic hypothesis |
68%
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A C3 plant was provided carbon dioxide labelled with a radioactive isotope. The amount of radioactivity was measured in chloroplasts. In which of the following molecules do you expect the radioactivity to appear first as the process of photosynthesis proceeds in this plant?
| 1. | OAA | 2. | PEP |
| 3. | PGA | 4. | RuBP |
Subtopic: Dark Reaction : Calvin Cycle |
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RuBP is:
| 1. | 2 carbon ketose sugar | 2. | 2 carbon aldose sugar |
| 3. | 5 carbon ketose sugar | 4. | 5 carbon aldose sugar |
Subtopic: Dark Reaction : Calvin Cycle |
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In Hatch and Slack pathway:
1. Only I and II are correct
2. II, III and IV are incorrect
3. Only I, II and III are correct
4. I, II, III and IV are correct
| I: | The C4 acid OAA is formed in the mesophyll cells. |
| II: | Malic acid or aspartic acid are transported to the bundle sheath cells. |
| III: | C4 acids are broken down to release carbon dioxide and a 3 carbon molecule in mesophyll cells. |
| IV: | The 3 carbon molecule is transported back to the bundle sheath cell where it is converted to PEP again. |
2. II, III and IV are incorrect
3. Only I, II and III are correct
4. I, II, III and IV are correct
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
63%
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