- 1(current)
Q. No.The process where energy from electron transfer is used to create a proton gradient, which then drives ATP synthesis, is called
1. Chemiosmosis
2. Substrate-level phosphorylation
3. Glycolysis
4. Oxidative phosphorylation
1. Chemiosmosis
2. Substrate-level phosphorylation
3. Glycolysis
4. Oxidative phosphorylation
Subtopic: Chemiosmotic hypothesis |
71%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
The chemiosmotic hypothesis (Mitchell) explains ATP synthesis as:
1. Substrate-level phosphorylation
2. Direct transfer of phosphate group
3. Utilisation of proton gradient across inner membrane
4. Breakdown of Acetyl-CoA
1. Substrate-level phosphorylation
2. Direct transfer of phosphate group
3. Utilisation of proton gradient across inner membrane
4. Breakdown of Acetyl-CoA
Subtopic: Chemiosmotic hypothesis |
84%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
The splitting of water molecule during photosynthesis occurs in the:
1. Stroma
2. Reaction eentre of Photocy slem I
3. Thylakoid hmen near Photosystem II
4. Cytoplasm
1. Stroma
2. Reaction eentre of Photocy slem I
3. Thylakoid hmen near Photosystem II
4. Cytoplasm
Subtopic: Chemiosmotic hypothesis |
88%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
"The proton gradient that drives ATP synthesis in chloroplasts has protons concentrated inside the thylakoid lumen (higher concentration) and lower concentration in the stroma, which is the opposite orientation compared to mitochondria where protons are c
1. True
2. False
1. True
2. False
Subtopic: Chemiosmotic hypothesis |
87%
Level 1: 80%+
Please attempt this question first.
Hints
In the chemiosmotic mechanism, the proton gradient required for ATP synthesis develops across:
1. Thylakoid membrane
2. Inner chloroplast membrane
3. Outer chloroplast membrane
4. Matrix membrane
1. Thylakoid membrane
2. Inner chloroplast membrane
3. Outer chloroplast membrane
4. Matrix membrane
Subtopic: Chemiosmotic hypothesis |
89%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Subtopic: Chemiosmotic hypothesis |
Level 4: Below 35%
Please attempt this question first.
Hints
The NADP reductase enzyme is located on the stroma side of the inner chloroplast membrane.
1. True
2. False
1. True
2. False
Subtopic: Chemiosmotic hypothesis |
Level 3: 35%-60%
Please attempt this question first.
Hints
Please attempt this question first.
Which event directly contributes to proton accumulation in the thylakoid lumen during light reactions?
1. Reduction of NADP+ on the stromal side
2. Splitting of water associated with PS II on the inner thylakoid membrane
3. Diffusion of protons through CF0 into the stroma
4. Regeneration of RuBP in the Calvin cycle
1. Reduction of NADP+ on the stromal side
2. Splitting of water associated with PS II on the inner thylakoid membrane
3. Diffusion of protons through CF0 into the stroma
4. Regeneration of RuBP in the Calvin cycle
Subtopic: Chemiosmotic hypothesis |
94%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
The chemiosmotic hypothesis for ATP synthesis in chloroplasts requires all EXCEPT:
1. A proton gradient across thylakoid membrane
2. ATP synthase complex (CF0–CF1)
3. Movement of protons from stroma to lumen through CF1
4. Intact thylakoid membrane
1. A proton gradient across thylakoid membrane
2. ATP synthase complex (CF0–CF1)
3. Movement of protons from stroma to lumen through CF1
4. Intact thylakoid membrane
Subtopic: Chemiosmotic hypothesis |
77%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
Consider the following statements regarding light reaction:
Which of the statements given above are correct?
1. I and III only
2. I and II only
3. II and III only
4. I, II and III
| I: | Photolysis of water occurs at PS II. |
| II: | Oxygen is released during the reduction of NADP. |
| III: | ATP synthesis occurs due to proton gradient across thylakoid membrane. |
1. I and III only
2. I and II only
3. II and III only
4. I, II and III
Subtopic: Light Reaction: Electron Transport | Light Reactions :1 | Light Reactions :2 | Light Reactions :3 | Chemiosmotic hypothesis |
70%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
- 1(current)
Q. No.
© 2026 GoodEd Technologies Pvt. Ltd.