Q. No.The overall reaction 6CO2 + 18 ATP + 12 NADPH + water → 2 glyceraldehyde 3-phosphate + 16 Pi + 18 ADP + 12 NADP+
| 1. | describes the light dependent reactions of photosynthesis. |
| 2. | is highly exergonic. |
| 3. | occurs only at night. |
| 4. | describes the fixation of carbon. |
Subtopic: Chemiosmotic hypothesis |
Please attempt this question first.
Hints
Please attempt this question first.
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%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on
1. proton gradient
2. accumulation of K ions
3. accumulation of Na ions
4. membrane potential
Subtopic: Chemiosmotic hypothesis |
97%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Synthesis of ATP linked to development of a proton gradient across a membrane is:
| 1. | Mass flow hypothesis | 2. | Wobble hypothesis |
| 3. | Chemiosmotic hypothesis | 4. | Rivet Popper hypothesis |
Subtopic: Chemiosmotic hypothesis |
96%
Level 1: 80%+
NEET - 2024
Hints
Regarding ATP synthase involved in chemiosmosis in chloroplasts:
| I: | The component CF0 is embedded in the thylakoid membrane. |
| II: | The component CF1 protrudes on the outer surface of the thylakoid membrane on the side that faces the stroma. |
| 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: Chemiosmotic hypothesis |
91%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Which of the following is a source of protons for the establishment of a proton gradient within a chloroplast?
1. phospholipids within thylakoid membranes
2. water
3.
4. chlorophyll
Subtopic: Chemiosmotic hypothesis |
90%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
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%
Level 1: 80%+
NEET - 2016
Hints
Consider the given two statements:
| Assertion (A): | If the pH inside the thylakoid lumen is increased above 7.5, ATP synthesis will be badly affected. |
| Reason (R): | ATP synthesis depends on the proton gradient, which collapses if lumen pH rises. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Chemiosmotic hypothesis |
89%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
During photosynthesis in higher plants, the splitting of water molecule (photolysis) occurs at which exact site of the thylakoid?
| 1. | Stroma lamellae |
| 2. | Lumen side of PS-II |
| 3. | Outer surface of PS-I |
| 4. | Matrix of mitochondria |
Subtopic: Chemiosmotic hypothesis |
89%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Given below are two statements:
| Assertion (A): | Proton gradient is important during photosynthesis. |
| Reason (R): | Breakdown of proton gradient leads to release of energy. |
| 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. | Both (A) and (R) are false. |
Subtopic: Chemiosmotic hypothesis |
89%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
© 2026 GoodEd Technologies Pvt. Ltd.