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Q. No.Decarboxylation is involved in:
1. electron transport system
2. glycolysis
3. Krebs' cycle
4. lactic acid fermentation
Subtopic: Kreb's Cycle |
85%
From NCERT
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Consider the given two statements:
| Assertion (A): | ATP acts as the energy currency of the cell. |
| Reason (R): | ATP is a ribonucleoside triphosphate. |
| 1. | Both (A) and (R) are True and (R) explains (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: Introduction |
From NCERT
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In anaerobic organisms, the only process in respiration is:
1. EMP pathway
2. Hatch and Slack pathway
3. Tricarboxylic acid cycle
4. Calvin Benson cycle
1. EMP pathway
2. Hatch and Slack pathway
3. Tricarboxylic acid cycle
4. Calvin Benson cycle
Subtopic: Glycolysis |
89%
From NCERT
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Sucrose is converted into glucose and fructose by the enzyme:
1. Lactase
2. Zymase
3. Diastase
4. Invertase
1. Lactase
2. Zymase
3. Diastase
4. Invertase
Subtopic: Glycolysis |
96%
From NCERT
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The step in the glycolytic pathway where NADH + H+ is formed from NAD+ is when:
| 1. | fructose 1, 6-bisphosphate is split into dihydroxyacetone phosphate and 3-phosphoglyceraldehyde (PGAL) |
| 2. | 3-phosphoglyceraldehyde (PGAL) is converted to 1, 3-bisphosphoglycerate (BPGA) |
| 3. | BPGA is converted to 3-phosphoglyceric acid (PGA) |
| 4. | PEP is converted to pyruvic acid |
Subtopic: Glycolysis |
81%
From NCERT
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The reaction 2 in the given figure is catalysed by the enzyme:
1. Pyruvate decarboxylase
2. Pyruvate kinase
3. Pyruvate dehydrogenase
4. Pyruvate synthetase
1. Pyruvate decarboxylase
2. Pyruvate kinase
3. Pyruvate dehydrogenase
4. Pyruvate synthetase
Subtopic: Fermentation |
70%
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During fermentation Yeasts poison themselves to death when the concentration of alcohol reaches about:
1. 5 percent
2. 13 per cent
3. 22 per cent
4. 44 per cent
1. 5 percent
2. 13 per cent
3. 22 per cent
4. 44 per cent
Subtopic: Fermentation |
96%
From NCERT
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In aerobic respiration, passing on of the electrons removed as part of the hydrogen atoms to molecular O2 with simultaneous synthesis of ATP, is associated with:
1. Outer mitochondrial membrane
2. Inner mitochondrial membrane
3. Mitochondrial matrix
4. Cytosol
1. Outer mitochondrial membrane
2. Inner mitochondrial membrane
3. Mitochondrial matrix
4. Cytosol
Subtopic: Aerobic Respiration |
84%
From NCERT
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Pyruvate, which is formed by the glycolytic catabolism of carbohydrates in the cytosol:
| 1. | undergoes oxidative decarboxylation in cytosol itself by a complex set of reactions catalysed by pyruvic kinase. |
| 2. | undergoes reduction in cytosol itself by a complex set of reactions catalysed by pyruvic dehydrogenase. |
| 3. | undergoes oxidative decarboxylation in mitochondrial matrix by a complex set of reactions catalysed by pyruvic dehydrogenase. |
| 4. | undergoes oxidative phosphorylation in mitochondrial matrix by a complex set of reactions catalysed by pyruvic decarboxylase. |
Subtopic: Aerobic Respiration |
76%
From NCERT
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In the TCA cycle, a molecule of GTP is synthesised:
1. During the first oxidative decarboxylation reaction
2. During the second oxidative decarboxylation reaction
3. During the condensation of acetyl group with oxaloacetic acid (OAA) and water to yield citric acid
4. During the conversion of succinyl-CoA to succinic acid
1. During the first oxidative decarboxylation reaction
2. During the second oxidative decarboxylation reaction
3. During the condensation of acetyl group with oxaloacetic acid (OAA) and water to yield citric acid
4. During the conversion of succinyl-CoA to succinic acid
Subtopic: Kreb's Cycle |
90%
From NCERT
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