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Q. No.How many ATP and NADPH molcules are required to make one molecule of glucose through the Calvin pathway?
| 1. | 18 ATP and 12 NADPH |
| 2. | 6 ATP and 12 NADPH |
| 3. | 24 ATP and 18 NADPH |
| 4. | 12 ATP and 18 NADPH |
Subtopic: Dark Reaction : Calvin Cycle |
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Find the incorrect statement(s) about photosynthesis from the following:
Choose the answer from the options given below:
| A. | The water splitting complex is associated with PS I. |
| B. | \(C_4\) plants use the \(C_3\) pathway of \(CO_2\) fixation as the main biosynthetic pathway. |
| C. | In \(C_4\) plants, photorespiration does not occur. |
| D. | \(C_3\) plants exhibit ‘Kranz’ anatomy. |
| E. | ATP synthesis in chloroplast occurs through chemiosmosis. |
| 1. | B only | 2. | A and D only |
| 3. | B and C only | 4. | B and E only |
Subtopic: Miscellaneous |
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The enzyme required for carboxylation in the Calvin cycle is:
1. PEP carboxylase
2. RuBP carboxylase - oxygenase
3. Carboxypeptidase
4. Hexokinase
1. PEP carboxylase
2. RuBP carboxylase - oxygenase
3. Carboxypeptidase
4. Hexokinase
Subtopic: Dark Reaction : Calvin Cycle |
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How many turns of Calvin cycle are required for the formation of three molecules of glucose?
| 1. | 18 | 2. | 6 |
| 3. | 3 | 4. | 1 |
Subtopic: Dark Reaction : Calvin Cycle |
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Photorespiration reaction catalyzed by RuBisCo is shown below :
RuBP + \(O_2\) → 3-Phosphoglycerate (3-PG)
Identify "X" from the given options :
RuBP + \(O_2\) → 3-Phosphoglycerate (3-PG)
Identify "X" from the given options :
| 1. | Malate | 2. | Phosphoenolpyruvate |
| 3. | 2-Phosphoglycolate | 4. | Oxaloacetate |
Subtopic: Photorespiration |
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Which pigment has absorption peak at 700 nm in the photosynthetic reaction centre PS I (P700) ?
| 1. | Carotenoids | 2. | Chlorophyll b |
| 3. | Chlorophyll a | 4. | Xanthophylls |
Subtopic: Pigments |
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Which of the following statements regarding photorespiration are correct?
Choose the correct answer from the options given below :
1. (a) and (b) only
2. (a) and (d) only
3. (c) and (d) only
4. (b) and (d) only
| (a) | Do not occur in C3 plants |
| (b) | CO\(_{2}\) is consumed and O\(_{2}\) is generated |
| (c) | Phosphoglycolate is formed |
| (d) | No synthesis of ATP and NADPH |
Choose the correct answer from the options given below :
1. (a) and (b) only
2. (a) and (d) only
3. (c) and (d) only
4. (b) and (d) only
Subtopic: Photorespiration |
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Select the correct sequence of experiments that led to a gradual understanding of photosynthesis in green plants.
| 1. | Production of glucose → role of air → release of oxygen → absorption spectra of chlorophyll a and b |
| 2. | Absorption spectra of chlorophyll a and b → production of glucose → release of oxygen → role of air |
| 3. | Role of air → release of oxygen → production of glucose → absorption spectra of chlorophyll a and b |
| 4. | Release of oxygen → production of glucose → absorption spectra of chlorophyll a and b → role of air |
Subtopic: Historical View: Experiments |
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Which of the following statements about RuBisCO is true?
| 1. | It is an enzyme involved in the photolysis of water. |
| 2. | It catalyzes the carboxylation of RuBP, |
| 3. | It is active only in the dark. |
| 4. | It has higher affinity for oxygen than carbon dioxide. |
Subtopic: Dark Reaction : Calvin Cycle |
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Match List-I with List-II:
| List-I | List-II | ||
| A. | Chlorophyll a | I. | Yellow-green |
| B. | Chlorophyll b | II. | Yellow |
| C. | Xanthophylls | III. | Blue-green |
| D. | Carotenoids | IV. | Yellow to Yellow-orange |
Choose the option with all correct matches:
| 1. | A-I, B-II, C-IV, D-III | 2. | A-I, B-IV, C-III, D-II |
| 3. | A-III, B-IV, C-II, D-I | 4. | A-III, B-I, C-II, D-IV |
Subtopic: Pigments |
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