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Q. No.
Assertion(A):
Ubiquinone is the only member of the electron transport chain that is not a protein.
Reason(R):
It is individually mobile within the membrane rather than residing in a particular complex
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 |
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | If oxygen is available, it is invariably used as the terminal electron acceptor in aerobic cellular respiration. |
| Reason (R): | It acts as the terminal electron as well as proton acceptor. |
In the light of the above statements choose the correct answer from the options given below:
| 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 |
| Assertion(A): | Electron transport chains are redox reactions that transfer electrons from an electron donor to an electron acceptor. |
| Reason(R): | The transfer of electrons is coupled to the translocation of protons across a membrane, producing a proton gradient. |
| 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 |
59%
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | ATP: NADH + H+ and ATP: FADH2 ratios during the oxidative phosphorylation appear to be not 3 and 2, but 2.5 and 1.5 respectively. |
| Reason (R): | ATP synthase produces 1 ATP/3H+. |
In the light of the above statements choose the correct answer from the options given below:
| 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: Oxidative Phosphorylation |
| Assertion(A): | Cyanide poisoning is a form of histotoxic hypoxia. |
| Reason(R): | Cyanide binds to iron of cytochrome c oxidase and thus prevents binding of oxygen to hemoglobin. |
| 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: Electron Transport Inhibitors |
Consider the given two statements:
| Assertion (A): | Homolactic fermentation (producing only lactic acid) is the simplest type of fermentation. |
| Reason (R): | It is one of the only respiration processes to not produce a gas as a byproduct. |
| 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, (R) is False. |
| 4. | (A) is False, (R) is True. |
Subtopic: Fermentation |
Consider the given two statements:
| Assertion (A): | Fermentation is an extension of glycolysis that can generate ATP by substrate level phosphorylation as long as a sufficient supply of NAD+ is available. |
| Reason (R): | NAD+ is an oxidizing agent in involved in glycolysis. |
| 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, (R) is False. |
| 4. | (A) is False, (R) is True. |
Subtopic: Fermentation |
| Assertion (A): | Catabolism can also harvest energy stored in fats obtained from food or from storage cells in the body. |
| Reason (R): | Fatty acids undergo beta oxidation in mitochondria to produce ATP directly. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explains (A) |
| 3. | (A) is True but (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Amphibolic Nature of Respiration |
| Assertion (A): | All the organic molecules of food are destined to be oxidized as fuel to make ATP. |
| Reason (R): | The catabolic pathway intermediates cannot be diverted to any anabolic pathway. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explains (A) |
| 3. | (A) is True but (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Amphibolic Nature of Respiration |
| Assertion(A): | If citrate accumulates in mitochondria, ATP production is slowed down. |
| Reason(R): | When this happens, some citrate passes into the cytosol and inhibits phosphofructokinase. |
| 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: Aerobic Respiration |
63%
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