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Q. No.The hypothesis “Plants restore to the air whatever breathing animals and burning candles remove” was given, after his experiments, by:
| 1. | Joseph Priestley | 2. | Jan Ingenhousz |
| 3. | Julius von Sachs | 4. | C. B. Van Neil |
Subtopic: Historical View: Experiments |
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Who first showed that it is only the green parts of the plants that could release oxygen during photosynthesis?
| 1. | Joseph Priestley | 2. | Jan Ingenhousz |
| 3. | Julius von Sachs | 4. | C. B. Van Neil |
Subtopic: Historical View: Experiments |
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C. B. van Niel proved that:
| 1. | Plants produce glucose when they grow. |
| 2. | Blue and red light are effective for photosynthesis. |
| 3. | It is only the green parts of the plants that could release oxygen. |
| 4. | Hydrogen from a suitable oxidizable compound reduces carbon dioxide to carbohydrates. |
Subtopic: Historical View: Experiments |
68%
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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 |
87%
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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 wavelengths of light most useful in photosynthesis are:
| 1. | green and orange | 2. | red and blue |
| 3. | infrared and yellow | 4. | red and green |
Subtopic: Pigments |
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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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The ‘light reaction’ of photosynthesis in higher plants does not include:
1. Light absorption
2. Water splitting and oxygen release
3. Formation of ATP and NADPH
4. Fixation of carbon
1. Light absorption
2. Water splitting and oxygen release
3. Formation of ATP and NADPH
4. Fixation of carbon
Subtopic: Dark Reaction: Biosynthetic Phase | Light Reactions |
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What is true regarding PSI and PSII?
1. PS I works before PS II during the light reaction
2. A single chlorophyll a molecule makes the reaction center in both PS I and PS II
3. The reaction center of PS I is P680 and in PS II is P700
4. LHC is seen in PS I but not in PS II
Subtopic: Light Reactions |
80%
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The electrons needed to replace those removed from PS I are provided by:
| 1. | The LHC | 2. | Water |
| 3. | NADPH | 4. | PS II |
Subtopic: Light Reaction: Electron Transport |
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