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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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Level 1: 80%+
NEET - 2026
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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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Level 2: 60%+
NEET - 2026
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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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NEET - 2026
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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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NEET - 2025
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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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NEET - 2025
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Which of the following are required for the dark reaction of photosynthesis?
Choose the correct answer from the options given below:
| A: | Light |
| B: | Chlorophyll |
| C: | CO2 |
| D: | ATP |
| E: | NADPH |
Choose the correct answer from the options given below:
| 1. | B, C and D only |
| 2. | C, D and E only |
| 3. | D and E only |
| 4. | A, B and C only |
Subtopic: Dark Reaction: Biosynthetic Phase | Dark Reaction : Calvin Cycle |
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Level 2: 60%+
NEET - 2024
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How many molecules of ATP and NADPH are required for every molecule of \(\text{CO}_2\) fixed in the Calvin cycle?
| 1. | 2 molecules of ATP and 2 molecules of NADPH |
| 2. | 3 molecules of ATP and 3 molecules of NADPH |
| 3. | 3 molecules of ATP and 2 molecules of NADPH |
| 4. | 2 molecules of ATP and 3 molecules of NADPH |
Subtopic: Dark Reaction : Calvin Cycle |
78%
Level 2: 60%+
NEET - 2024
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Given below are two statements:
In the light of the above statements, choose the correct answer from the option given below:
| Statement I: | In \(\text{C}_3\) plants, some \( \text{O}_2\) binds to \(\text{RuBisCO},\) hence \(\text{CO}_2\) fixation is decreased. |
| Statement II: | In \( \text{C}_4\) plants, mesophyll cells show very little photorespiration while bundle sheath cells do not show photorespiration. |
In the light of the above statements, choose the correct answer from the option given below:
| 1. | Both Statement I and Statement II are False |
| 2. | Statement I is True but Statement II is False |
| 3. | Statement I is False but Statement II is True |
| 4. | Both Statement I and Statement II are True |
Subtopic: Photorespiration |
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The photochemical phase of photosynthesis include:
Choose the correct answer from the options given below:
| A. | Oxygen release | B. | Formation of NADPH |
| C. | Use of ATP | D. | Water splitting |
| E. | Carboxylation | ||
| 1. | C and E only | 2. | A, B and D only |
| 3. | B, C and E only | 4. | A, B, C and D only |
Subtopic: Light Reaction: Electron Transport |
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Level 2: 60%+
NEET - 2024
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Match List-I with List-II
Choose the correct answer from the options given below:
| List-I | List-II | ||
| A | C4 Pathway | I. | \(2\text{H}_2\text{O}\rightarrow4\text{H}^++\text{O}_2=4\text{e}^-\) |
| B. | Light reaction | II. | Ribulose 1,5-bisphosphate |
| C. | Photorespiration | III. | 3-carbon molecule, phosphoenol pyruvate |
| D. | Calvin cycle | IV. | Phosphoglycolate |
| 1. | A-II, B-I, C-IV, D-III |
| 2. | A-IV, B-II, C-I, D-III |
| 3. | A-III, B-I, C-IV, D-II |
| 4. | A-III, B-IV, C-II, D-I |
Subtopic: Photosystems | Dark Reaction : Calvin Cycle | C4 Cycle (Hatch & Slack Pathway) | Photorespiration |
77%
Level 2: 60%+
NEET - 2024
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