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Q. No.With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?
| 1. | Increasing atmospheric CO2 concentration up to 0.05% can enhance the CO2 fixation rate |
| 2. | C3 plants respond to higher temperatures with enhanced photosynthesis while C4 plants have much lower temperature optimum |
| 3. | Tomato is a greenhouse crop that can be grown in CO2 enriched atmosphere for higher yield |
| 4. | Light saturation for CO2 fixation occurs at 10% of full sunlight |
Subtopic: Â Factors Affecting Photosynthesis |
 81%
Level 1: 80%+
NEET - 2017
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One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of:
| 1. | Violet and green light | 2. | Indigo and green light |
| 3. | Orange and yellow light | 4. | Blue and red light |
Subtopic: Â Historical View: Experiments |
 92%
Level 1: 80%+
NEET - 2019
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Oxygen is not produced during photosynthesis by:
| 1. | Green sulphur bacteria | 2. | Nostoc |
| 3. | Cycas | 4. | Chara |
Subtopic: Â Historical View: Experiments |
 83%
Level 1: 80%+
NEET - 2018
Hints
Match List-I with List-II
Choose the correct answer from the options given below:
| List-I | List-II | ||
| (A) | Chlorophyll a | (I) | Yellow to yellow orange |
| (B) | Chlorophyll b | (II) | Yellow green |
| (C) | Xanthophyll | (III) | Blue green |
| (D) | Carotenoids | (IV) | Yellow |
| Options: | (A) | (B) | (C) | (D) |
| 1. | III | II | IV | I |
| 2. | III | I | IV | II |
| 3. | II | III | I | IV |
| 4. | IV | III | II | I |
Subtopic: Â Pigments |
 85%
Level 1: 80%+
NEET - 2023
Hints
Which of the following are required for the light reaction of photosynthesis?
1. A, C, D and E only
2. C, D and E only
3. A and B only
4. A, C and E only
| A. | \(\mathrm {CO}_2\) | B. | \(\mathrm {O}_2\) |
| C. | \(\mathrm {H_2O}\) | D. | Chlorophyll |
| E. | Light | ||
2. C, D and E only
3. A and B only
4. A, C and E only
Subtopic: Â Light Reaction: Electron Transport |
 52%
Level 3: 35%-60%
NEET - 2024
Hints
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: Â Light Reaction: Electron Transport |
 62%
Level 2: 60%+
NEET - 2024
Hints
Which out of the following statements is incorrect?
| 1. | Grana lamellae have both PS I and PS II |
| 2. | Cyclic photophosphorylation involved both PS I and PS II |
| 3. | Both ATP and NADPH + H+ are synthesised during non-cyclic photophosphorylation |
| 4. | Stroma lamellae lack PS II and NADP reductase |
Subtopic: Â Light Reaction: Electron Transport |
 80%
Level 1: 80%+
NEET - 2023
Hints
The reaction centre in PS II has an absorption maxima at:
| 1. | 780 nm | 2. | 680 nm |
| 3. | 700 nm | 4. | 660 nm |
Subtopic: Â Light Reactions |
 90%
Level 1: 80%+
NEET - 2023
Hints
The products of light reaction in photosynthesis are:
| 1. | ATP, NADPH and \(\text{O}_2\) |
| 2. | ATP, NADPH, \(\text{O}_2\) and \(\text{H}_2 \text{O}\) |
| 3. | ATP, NADPH and \(\text{H}_2 \text{O}\) |
| 4. | ATP, NADPH and \(\text{CO}_2\) |
Subtopic: Â Light Reaction: Electron Transport |Â Light Reactions |
 78%
Level 2: 60%+
NEET - 2022
Hints
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 synthesized during non-cyclic photophosphorylation. |
| 4. | Stroma lamellae have PS I only and lack NADP reductase. |
Subtopic: Â Light Reaction: Electron Transport |
 83%
Level 1: 80%+
NEET - 2021
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