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Q. No.Which one of the following is not true regarding the release of energy during ATP synthesis through chemiosmosis?
It involves:
It involves:
| 1. | Reduction of NADP to NADPH2 on the stroma side of the membrane |
| 2. | Breakdown of proton gradient |
| 3. | Breakdown of electron gradient |
| 4. | Movement of protons across the membrane to the stroma |
Subtopic: Chemiosmotic hypothesis |
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NEET - 2022
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Which of the following is not a product of light reaction of photosynthesis?
| 1. | ATP | 2. | NADH |
| 3. | NADPH | 4. | Oxygen |
Subtopic: Light Reaction: Photophosphorylation |
76%
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NEET - 2018
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A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilization. In which of the following physiological groups would you assign this plant?
| 1. | C4 | 2. | CAM |
| 3. | Nitrogen –fixer | 4. | C3 |
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
88%
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NEET - 2016
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Consider the given two statements:
| Assertion (A): | The dark reactions of photosynthesis are temperature controlled |
| Reason (R): | The dark reactions of photosynthesis are enzyme catalyzed |
| 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 |
71%
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Which of the following statements is incorrect?
| 1. | RuBisCO is a bifunctional enzyme |
| 2. | In C4 plants, the site of RuBisCO activity is mesophyll cell |
| 3. | The substrate molecule for RuBisCO activity is a 5-carbon compound |
| 4. | RuBisCO action requires ATP and NADPH |
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
80%
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NEET - 2020
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Bundle sheath cells:
| 1. | are rich in PEP carboxylase |
| 2. | lack RuBisCo |
| 3. | lack both RuBisCo and PEP carboxylase |
| 4. | are rich in RuBisCo |
Subtopic: Dark Reaction : Calvin Cycle | C4 Cycle (Hatch & Slack Pathway) |
80%
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NEET - 2013
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The mechanism by which electron transport is coupled to ATP production by means of a proton gradient is called
| 1. | chemiosmosis |
| 2. | crassulacean acid metabolism |
| 3. | fluorescence |
| 4. | the C3 pathway |
Subtopic: Chemiosmotic hypothesis |
97%
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The relative effectiveness of different wavelengths of light in photosynthesis is demonstrated by
1. an action spectrum
2. photolysis
3. carbon fixation reactions
4. photoheterotrophs
1. an action spectrum
2. photolysis
3. carbon fixation reactions
4. photoheterotrophs
Subtopic: Photosynthetic Pigments |
96%
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In photosynthesis in eukaryotes, the transfer of electrons through a sequence of electron acceptors provides energy to pump protons across the
| 1. | chloroplast outer membrane |
| 2. | chloroplast inner membrane |
| 3. | thylakoid membrane |
| 4. | inner mitochondrial membrane |
Subtopic: Light Reaction: Electron Transport | Chemiosmotic hypothesis |
78%
From NCERT
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In chloroplast, the highest number of protons are found in?
| 1. | lumen of thylakoids | 2. | intermembrane space |
| 3. | antennae complex | 4. | stroma |
Subtopic: Chemiosmotic hypothesis |
89%
From NCERT
NEET - 2016
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