There can be a net gain of ­­­­____ ATP molecules during aerobic respiration of one molecule of glucose
[as per NCERT textbook]:
1. 30
2. 36
3. 38
4. 40

Subtopic:  THE RESPIRATORY BALANCE SHEET |
 86%
From NCERT
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Correct comparisons between fermentation and aerobic respiration will include:
I: Fermentation accounts for only a partial breakdown of glucose, whereas in aerobic respiration, it is completely degraded to CO2 and H2O.
II: In fermentation, there is a net gain of only two molecules of ATP for each molecule of glucose degraded to pyruvic acid, whereas many more molecules of ATP are generated under aerobic conditions.
III: NADH is oxidised to NAD+ rather slowly in fermentation, however, the reaction is very vigorous in case of aerobic respiration.
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic:  THE RESPIRATORY BALANCE SHEET |
 79%
From NCERT
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Glycerol enters the respiratory catabolic pathway after being converted to:
1. PGAL
2. Fructose
3. Pyruvate
4. Acetyl CoA
Subtopic:  THE RESPIRATORY BALANCE SHEET |
 71%
From NCERT
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Consider the given two statements:
Statement I: Fatty acids would be broken down to acetyl CoA before entering the respiratory
pathway when it is used as a substrate.
Statement II: When the organism needs to synthesise fatty acids, acetyl CoA would be
withdrawn from the respiratory pathway for it.
1. Statement I is correct; Statement II is incorrect
2. Statement I is incorrect; Statement II is correct
3. Statement I is incorrect; Statement II is incorrect
4. Statement I is correct; Statement II is correct
Subtopic:  Amphibolic Nature of Respiration | THE RESPIRATORY BALANCE SHEET |
 85%
From NCERT
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Consider the given two statements:
Assertion (A): It is better to consider the respiratory pathway as an amphibolic pathway rather than only as a catabolic one.
Reason (R): Breaking down processes within the living organism is catabolism, and synthesis is anabolism.
 
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. (A) is False but (R) is True
Subtopic:  THE RESPIRATORY BALANCE SHEET |
 58%
From NCERT
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Consider the given two statements:
Assertion (A): When carbohydrates are used as respiratory substrate and are completely oxidised, the RQ will be 1.
Reason (R): Equal amounts of CO2 and O2 are evolved and consumed, when carbohydrates are used as respiratory substrate and are completely oxidised.
 
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:  Respiratory Quotient |
 94%
From NCERT
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The number of points in the TCA cycle where FAD+ is reduced to FADH2 is/are:
1. 1
2. 2
3. 3
4. 4
Subtopic:  Kreb's Cycle |
 88%
From NCERT
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In which of the following steps of glycolysis neither ATP is produced nor hydrolyzed?
1. Glucose → glucose‐6‐phosphate
2. Phosphoenolpyruvate → pyruvate
3. Fructose‐6‐phosphate → fructose‐1,6‐bisphosphate
4. Glyceraldehyde-3‐phosphate→1,3-bisphosphoglycerate
Subtopic:  Glycolysis |
 64%
From NCERT
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Consider the given two statements:
Assertion (A): It is possible to make calculations of the net gain of ATP for every glucose molecule oxidised; but in reality this can remain only a theoretical exercise.
Reason (R): These calculations can be made only on certain assumptions that are not really valid in a living system.
 
1. Both (A) and (R) are True and (R) correctly explains the (A)
2. Both (A) and (R) are True but (R) is not the correct explanation of the (A)
3. (A) is True but (R) is False
4. (A) is False but (R) is True
Subtopic:  Aerobic Respiration | THE RESPIRATORY BALANCE SHEET |
 88%
From NCERT
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Regarding ATP synthase (complex V):
I: The F1 headpiece is a peripheral membrane protein complex and contains the site for synthesis of ATP from ADP and inorganic phosphate.
II: F0 is an integral membrane protein complex that forms the channel through which protons cross the inner membrane.
III: The F0 headpiece is a peripheral membrane protein complex and contains the site for synthesis of ATP from ADP and inorganic phosphate.
IV: F1 is an integral membrane protein complex that forms the channel through which protons cross the inner membrane.
1. I and II are correct
2. III and IV are correct
3. I and III are correct
4. II and IV are correct
Subtopic:  ETS |
 90%
From NCERT
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