Consider the two statements:

Statement I: Inside a cell, the glucose molecule is oxidised not in one step but in several small steps.
Statement II: Some steps will be just large enough such that energy liberated can be coupled to ATP synthesis.
 
1. Both Statement I and Statement II are correct and Statement II explains Statement I
2. Both Statement I and Statement II are correct but Statement II does not explain Statement I
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct

Subtopic:  Introduction |
 56%
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The number of metabolic steps in EMP pathway where glucose undergoes partial oxidation to form two molecules of pyruvic acid is:

1. 8 2. 9
3. 10 4. 11
Subtopic:  Glycolysis |
 89%
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In glycolysis, ATP is synthesised:
1. during conversion of 1,3 biphosphoglyceric acid to 3-phosphoglyceric acid and during conversion of phosphoenolpuruvate to pyruvic acid
2. during conversion of glucose to glucose-6-phospate and during conversion of fructose-6-phosphate to fructose – 1,6- biphosphate
3. during conversion of glucose to glucose-6-phospate and during conversion of glucose-6-phosphate to fructose-6- phosphate
4. during conversion of 3-phosphoglyceric acid to 2-phosphoglycerate and during conversion of 2-phosphoglycerate to phosphoenolpuruvate
Subtopic:  Glycolysis |
 84%
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The net gain of number of ATP molecules during glycolysis will be:

1. 2 2. 4
3. 6 4. 8
Subtopic:  Glycolysis |
 79%
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In glycolysis, NAD+ is reduced to NADH + H+:
1. during conversion of 1,3 biphosphoglyceric acid to 3-phosphoglyceric acid
2. during conversion of glyceraldehyde -3-phosphate to 1,3 biphosphoglyceric acid
3. during conversion of glucose to glucose-6-phospate
4. during conversion of 3-phosphoglyceric acid to 2-phosphoglycerate
Subtopic:  Glycolysis |
 79%
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Consider the given statements:

Statement I:  In alcohol fermentation in yeast, pyruvic acid decarboxylase and alcohol dehydrogenase convert pyruvic acid to carbon dioxide and ethanol.
Statement II:  In lactic acid fermentation, lactate dehydrogenase reduces pyruvic acid to lactic acid and carbon dioxide in muscle cells during exercise.
 
1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct
Subtopic:  Fermentation |
 55%
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During aerobic respiration, the complete oxidation of pyruvate by the stepwise removal of all the hydrogen atoms, leaving three molecules of carbon dioxide, takes place in the:
1. Cytosol
2. Mitochondrial matrix
3. Mitochondrial inter-membrane space
4. Inner mitochondrial membrane
Subtopic:  Aerobic Respiration |
 74%
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After the two molecules of pyruvate, produced at the end of glycolysis from one molecule of glucose, enter the mitochondrial matrix and till the Krebs cycle is complete, which of the following will not be a correct number of the corresponding molecule produced?
1. Eight molecules of NADH + H+
2. Two molecules of FADH2
3. Two molecules of ATP
4. Four molecules of carbon dioxide
Subtopic:  Aerobic Respiration |
 63%
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Which complex in the mitochondrial electron transport system contains cytochromes a and a3 and two copper centres?
1. Complex I 2. Complex II
3. Complex III 4. Complex IV
Subtopic:  ETS |
 87%
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Consider the following statements regarding ATP synthase, complex V of the mitochondrial electron transport system:
I: The F1 headpiece is peripheral membrane protein complex and contains the site for the synthesis of ATP from ADP and inorganic phosphate.
II: The F0 is an integral membrane protein complex that forms the channel through which protons cross the inner membrane.
III: For each ATP produced, 4H+ passes through F0 from the intermembrane space to the matrix down the electrochemical proton gradient.
1. Only III is correct
2. Only I and II are correct
3. I, II and III are correct
4. I, II and III are incorrect
Subtopic:  ETS |
 56%
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