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Q. No.Photosynthesis is important because:
| I: | It is the primary source of all food on earth. |
| II: | It is responsible for the release of oxygen into the atmosphere by green plants. |
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
Subtopic: Factors Affecting Photosynthesis |
94%
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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 |
92%
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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 |
73%
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Julius von Sachs provided evidence for:
Which of the following will be true in light of the information given above?
| I: | production of glucose when plants grow |
| II: | location of green substance in plants in special bodies |
| A: | Glucose produced during photosynthesis is usually stored as cellulose in plants. |
| B: | The ‘green substance’ refers to chlorophyll. |
| C: | ‘Special bodies’ refer to chloroplasts in the plant cells. |
| 1. | Only A and B | 2. | Only B and C |
| 3. | Only A | 4. | A, B and C |
Subtopic: Historical View: Experiments |
79%
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The diagram shows the famous Engelmann experiment that helped us understand important aspects of the process of photosynthesis. What conclusion can be drawn by the pattern of accumulation of aerobic bacteria shown in the diagram?
| 1. | Excess carbon dioxide is released by the alga in the area of accumulation. |
| 2. | Only red and violet lights are effective for photosynthesis. |
| 3. | In the areas of accumulation, most oxygen was liberated by the alga. |
| 4. | Bacteria are attracted to red and blue light. |
Subtopic: Pigments |
56%
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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 |
69%
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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 |
86%
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In the chloroplast:
| Statement I: | The membrane system is the site of enzymatic reactions leading to synthesis of sugar. |
| Statement II: | The stroma is responsible for trapping the light energy and also for the synthesis of ATP and NADPH. |
| 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: Chloroplast Structure |
61%
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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 |
81%
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It can be correctly said about the relation between the absorption spectra of various pigments and the action spectrum of photosynthesis that:
| 1. | There is a complete one to one overlap between the absorption spectrum of chlorophyll a and the action spectrum of photosynthesis. |
| 2. | There is a complete one to one overlap between the absorption spectrum of chlorophyll b and the action spectrum of photosynthesis. |
| 3. | The absorption spectrum of chlorophyll a is wider than the action spectrum of photosynthesis. |
| 4. | The absorption spectrum of chlorophyll a is narrower than the action spectrum of photosynthesis. |
Subtopic: Pigments |
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