How many times decarboxylation occurs during each TCA cycle?
1.Thrice2.Many
3.Once4.Twice

Subtopic:  Kreb's Cycle |
 72%
Level 2: 60%+
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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
Subtopic:  Amphibolic Nature of Respiration |
 81%
Level 1: 80%+
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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 |
 83%
Level 1: 80%+
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What is the R.Q. of glucose?
1. One
2. Less than one
3. More than one
4. Infinite
Subtopic:  Respiratory Quotient |
 88%
Level 1: 80%+
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How many molecules of pyruvic acid are formed in glycolysis?
1. 2
2. 1
3. 15
4. 16
Subtopic:  Glycolysis |
 91%
Level 1: 80%+
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RQ of malic acid is:
1. 1.9
2. 1.49
3. 1.33
4. 1
Subtopic:  Respiratory Quotient |
 54%
Level 3: 35%-60%
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Match List I with List II 
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 
Choose the correct answer from the options given below:
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 |
 73%
Level 2: 60%+
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Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R):
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.

In the light of the above statements, choose the correct answer from the options given below :
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 |
 82%
Level 1: 80%+
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Consider the two given statements:
Assertion (A): In aerobic cellular respiration the presence of oxygen is vital.
Reason (R): Oxygen acts as the final hydrogen acceptor.
 
1. Both (A) and (R) are True and (R) correctly explains (A)
2. (A) is True but (R) is False
3. (A) is False but (R) is True
4. Both (A) and (R) are True but (R) does not correctly explain (A)
Subtopic:  ETS |
 79%
Level 2: 60%+
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The glycolytic pathway has an investment of 2 ATP molecules. At which of the following steps is the debt paid off?
1. Conversion of Glucose into Glucose-6-phospahte
2. Conversion of Fructose-6-phosphate  into Fructose 1,6-biphospahte
3. Conversion of 1,3 biphoshoglyceric acid into 3-phosphoglyceric acid
4. Conversion of Phosphoenol pyruvate into Pyruvic acid
Subtopic:  Glycolysis |
 59%
Level 3: 35%-60%
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