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Q. No.How many of the given statements regarding Mitochondrial Electron Transport System (ETS) and Oxidative Phosphorylation are correct?
I: Ubiquinone receives reducing equivalents via FADH2 (complex II) and NADH dehydrogenase (complex I).
II: The reduced ubiquinone (ubiquinol) is then oxidised with the transfer of electrons to cytochrome c via cytochrome bc1 complex (complex III).
III: Cytochrome c is a small protein attached to the inner surface of the outer membrane.
IV: Complex IV contains cytochromes a and a3, and two copper centres.
V: Oxygen acts as the final hydrogen acceptor.
1. 2
2. 3
3. 4
4. 5
Subtopic: ETS |
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From NCERT
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Regarding comparison of fermentation and aerobic respiration, the incorrect statements will be:
1. Only I and II
2. Only III
3. Only II and III
4. I, II and III
| Fermentation | Aerobic respiration | |
| I | Partial breakdown of glucose | Complete breakdown of glucose |
| II | A net gain of only two molecules of ATP for each molecule of glucose degraded |
Many more molecules of ATP are generated |
| III | NADH is oxidised to NAD+ vigorously | NADH is oxidised to NAD+ rather slowly |
1. Only I and II
2. Only III
3. Only II and III
4. I, II and III
Subtopic: Fermentation | Aerobic Respiration |
65%
From NCERT
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Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements, choose the correct answer from the options given below :
| Assertion (A): | ATP is used at two steps in glycolysis . |
| Reason (R): | First ATP is used in converting glucose into glocose-6-phosphate and second ATP is used in conversion of fructose-6-phosphate into fructose-1-6-diphosphate. |
| 1. | (A) is False but (R) is True. |
| 2. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 3. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 4. | (A) is True but (R) is False. |
Subtopic: Glycolysis |
80%
From NCERT
NEET - 2023
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Match List I with List II
Choose the correct answer from the options given below:
| List I | List II | ||
| A. | Oxidative decarboxylation | I. | Citrate synthase |
| B. | Glycolysis | II. | Pyruvate dehydrogenase |
| C. | Oxidative phosphorylation | III. | Electron transport system |
| D. | Tricarboxylic acid cycle | IV. | EMP pathway |
| Options: | A | B | C | D |
| 1. | II | IV | III | I |
| 2. | III | IV | II | I |
| 3. | II | IV | I | III |
| 4. | III | I | II | IV |
Subtopic: Aerobic Respiration | Kreb's Cycle |
71%
From NCERT
NEET - 2023
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Subtopic: Kreb's Cycle |
71%
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NEET - 2023
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Fatty acids are connected with the respiratory pathway through:
1. Acetyl CoA
2. α - Ketoglutaric acid
3. Dihydroxy acetone phosphate
4. Pyruvic acid
1. Acetyl CoA
2. α - Ketoglutaric acid
3. Dihydroxy acetone phosphate
4. Pyruvic acid
Subtopic: Amphibolic Nature of Respiration |
80%
From NCERT
NEET - 2023
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| Assertion (A): | ATP acts as the energy currency of the cell. |
| Reason (R): | Energy trapped in ATP is utilized in various energy-requiring processes of the organisms. |
| 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: Respiratory Quotient |
89%
From NCERT
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Given below are two statements:
| Assertion (A): | Plants have stomata and lenticels that ensure the availability of O2. |
| Reason (R): | Plants require CO2 for respiration and they give out O2. |
| 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: Introduction |
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Given below are two statements:
| Assertion (A): | When a plant cell is photosynthesizing, there is no shortage of O2. |
| Reason (R): | O2 is released within the cell, during photosynthesis. |
| 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: Introduction |
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Given below are two statements:
| Assertion (A): | Although the aerobic process of respiration takes place only in the presence of O2, the role of O2 is limited to the terminal stage of the process. |
| Reason (R): | Oxygen acts as the final hydrogen acceptor in ETS. |
| 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: ETS |
82%
From NCERT
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