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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%
Level 1: 80%+
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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%
Level 1: 80%+
Hints
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 |
74%
Level 2: 60%+
Hints
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%
Level 2: 60%+
Hints
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%
Level 1: 80%+
Hints
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%
Level 2: 60%+
Hints
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 |
80%
Level 1: 80%+
Hints
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 |
88%
Level 1: 80%+
Hints
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 |
Subtopic: Dark Reaction: Biosynthetic Phase | Light Reactions |
90%
Level 1: 80%+
Hints
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 |
93%
Level 1: 80%+
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