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Q. No.In non-cyclic photophosphorylation, the ultimate acceptor of electrons is:
| 1. | Oxygen | 2. | NADP+ |
| 3. | Water | 4. | G3P |
Subtopic: Photosynthetic Pigments | Light Reaction: Photophosphorylation | Light Reactions :1 | Light Reactions :2 | Light Reactions :3 |
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Who provided evidence for production of glucose when plants grow and that the glucose is usually stored as starch in plants?
1. Arnon and his team
2. F. F. Blackmann
3. Julius von Sachs
4. Jan Ingenhousz
1. Arnon and his team
2. F. F. Blackmann
3. Julius von Sachs
4. Jan Ingenhousz
Subtopic: Historical View: Experiments |
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There is a clear division of labor within the chloroplast. Which of the following will be true?
1. Only A is correct.
2. Only B is correct.
3. Both A and B are correct.
4. Both A and B are incorrect.
| A: | The membrane system is responsible for trapping the light energy and also for the synthesis of ATP and NADPH. |
| B: | In stroma, enzymatic reactions synthesize sugar, which in turn forms starch. |
2. Only B is correct.
3. Both A and B are correct.
4. Both A and B are incorrect.
Subtopic: Chloroplast Structure |
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Consider the given two statements:
| Assertion (A): | Electron transport via cytochrome b6f is responsible for creating the proton gradient that drives the synthesis of ATP in chloroplasts. |
| Reason (R): | Cytochrome b6f complex functions to mediate the transfer of electrons and of energy between Photosystem II and Photosystem I, while transferring protons from the chloroplast stroma across the thylakoid membrane into the lumen. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Chemiosmotic hypothesis |
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The molecule used to fix carbon dioxide in Calvin cycle is:
| 1. | Acetyl CoA, a 2 carbon molecule |
| 2. | G3P (Glyceraldehyde-3-phosphate), a 3 carbon molecule |
| 3. | RuBP (Ribulose-1,5-bisphosphate), a 5 carbon molecule |
| 4. | Citrate, a 6 carbon molecule |
Subtopic: Dark Reaction : Calvin Cycle |
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Match the following scientists with their contributions to the study of photosynthesis:
Options:
| Column A | Column B | ||
| 1. | Priestley | A. | Proposed that water is split in the process of photosynthesis. |
| 2. | Engelmann | B. | Demonstrated that oxygen is produced from plants exposed to light. |
| 3. | Van Niel | C. | Used a prism to show that different wavelengths of light affect oxygen production differently. |
| 4. | Ingenhousz | D. | Discovered that plants release oxygen. |
| 1. | 1-D, 2-B, 3-C, 4-A |
| 2. | 1-B, 2-D, 3-A, 4-C |
| 3. | 1-D, 2-C, 3-A, 4-B |
| 4. | 1-C, 2-A, 3-B, 4-D |
Subtopic: Historical View: Experiments |
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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 |
Subtopic: Dark Reaction: Biosynthetic Phase | Light Reactions |
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Water affects the process of photosynthesis in higher plants because:
| I: | Water stress can cause the stomata to close, hence, reducing the carbon dioxide availability. |
| II: | Water stress also makes leaves wilt, thus, reducing the surface area of the leaves and their metabolic activity as well. |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
Subtopic: Factors Affecting Photosynthesis |
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Consider the given two statements:
| Assertion (A): | Green house crops such as tomatoes & bell pepper are allowed to grow in \(CO_2\) enriched atmosphere. This leads to higher yields |
| Reason (R): | Tomato and Bell pepper are \(C_4\) plants |
| 1. | Both (A) and (R) are True, and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True, but (R) is not the correct explanation of (A). |
| 3. | (A) is True, but (R) is False. |
| 4. | (A) is False, but (R) is True. |
Subtopic: Factors Affecting Photosynthesis |
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What is the name of the 2-carbon compound formed in photorespiration?
| 1. | Acetyl CoA | 2. | Phosphoglycolate |
| 3. | Acetic acid | 4. | Ethanol |
Subtopic: Photorespiration |
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