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Q. No.Which of the following statements is incorrect?
1.
Grana lamellae have both PS I and PS II.
2.
Cyclic photophosphorylation involves both PS I and PS II.
3.
Both ATP and NADPH + H+ are non-cyclic synthesized during photophosphorylation.
4.
Stroma lamellae have PS I only and lack NADP reductase.
Subtopic: Light Reaction: Electron Transport |
82%
From NCERT
NEET - 2021
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
Both C4 and CAM plants employ physiological and biochemical strategies to reduce photorespiration. Which of the following is an accurate comparison of the two strategies?
| 1. | C4 plants fix CO2 as the 4-carbon acid oxaloacetate, while CAM plants fix CO2 as the 5-carbon acid ribulose 1, 5-bisphosphate. |
| 2. | C4 plants fix CO2 in the mesophyll but carry out the Calvin cycle in the bundle sheath, while CAM plants fix CO2 and carry out the Calvin cycle in the mesophyll. |
| 3. | C4 plants fix CO2 in the bundle sheath but carry out the Calvin cycle in the mesophyll, while CAM plants fix CO2 and carry out the Calvin cycle in the bundle sheath. |
| 4. | C4 plants store CO2 as phosphoglycolate, while CAM plants store CO2 as oxaloacetate. |
| 5. | C4 plants carry out photosynthetic electron transport in the daytime, while CAM plants carry out photosynthetic electron transport at night. |
Subtopic: C4 Cycle (Hatch & Slack Pathway) | CAM Pathway |
63%
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The first stable product of CO2 fixation in sorghum is:
1. Succinic acid
2. Phosphoglyceric acid
3. Pyruvic acid
4. Oxaloacetic acid
Subtopic: C4 Cycle (Hatch & Slack Pathway) | C4 Plants Examples |
81%
From NCERT
NEET - 2021
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
Study the pathway given below:
In which of the following options, correct words for all the three blanks A, B and C are indicated?
| A | B | C | |
| 1. | Fixation | Transamination | Regeneration |
| 2. | Fixation | Decarboxylation | Regeneration |
| 3. | Carboxylation | Decarboxylation | Reduction |
| 4. | Decarboxylation | Reduction | Regeneration |
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
76%
From NCERT
AIPMT - 2010
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NEET 2025 - Target Batch
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During non-cyclic photophosphorylation, when electrons are lost from the reaction center at PS II, what is the source which replaces these electrons?
| 1. | Oxygen | 2. | Water |
| 3. | Carbon dioxide | 4. | Light |
Subtopic: Light Reaction: Photophosphorylation |
84%
From NCERT
NEET - 2020
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NEET 2025 - Target Batch
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Consider the two statements:
| I: | Current availability of carbon dioxide levels is limiting to the C4 plants. |
| II: | C3 plants have a much lower temperature optimum than C4 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: C4 Cycle (Hatch & Slack Pathway) | C4 Plants Examples | Factors Affecting Photosynthesis |
63%
From NCERT
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Bundle sheath cells, part of Kranz anatomy in a C4 plant, are not characterized by:
| 1. | May form several layers around the vascular bundle |
| 2. | Have large number of chloroplasts |
| 3. | Have thick walls impervious to gaseous exchange |
| 4. | Large intercellular spaces are seen |
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
84%
From NCERT
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Match the Scientists given in Column I with their contribution in Column II and select the correct match from the codes given:
Codes
| Column I | Column II | ||
| A. | Jan Ingenhousz | P. | Provided evidence for production of glucose when plants grow |
| B. | T. W Engelmann | Q. | Described the first action spectrum for photosynthesis |
| C. | Julius von Sachs | R. | Showed that sunlight is essential for photosynthesis |
| D. | Cornelius van Neil | S. | Inferred that oxygen evolved in photosynthesis comes from water and not from carbon dioxide |
| A | B | C | D | |
| 1. | R | Q | P | S |
| 2. | Q | R | S | P |
| 3. | P | S | R | Q |
| 4. | S | P | Q | R |
Subtopic: Introduction | Historical View: Experiments |
89%
From NCERT
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Accessory pigments of photosynthesis in higher plants:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| I: | include chlorophyll b, xanthophylls and carotenoids. |
| II: | absorb light and transfer electrons to chlorophyll a. |
| III: | protect chlorophyll a from photo-oxidation. |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Pigments |
From NCERT
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What provides the electrons needed to replace those removed from photosystem II during non cyclic photophosphorylation?
| 1. | PS I | 2. | Oxygen |
| 3. | Water | 4. | Carbon dioxide |
Subtopic: Light Reaction: Electron Transport |
87%
From NCERT
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