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Q. No.At which step, glycolysis reaches the break-even point where 2 molecules of ATP are consumed, and 2 new molecules are synthesized?
1.
Splitting of fructose-6-phosphate to two trioses
2.
Conversion of 1,3 biphosphoglycerate to 3 - phosphoglycerate
3.
Conversion of GADP to 1,3 biphosphogycerate
4.
Conversion of DHAP to GADP
Subtopic: Glycolysis |
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Glycolysis is a sequence of ________ reactions involving ___________ intermediate compounds:
1. 10, 5
2. 10, 9
3. 10, 10
4. 9, 10
Subtopic: Glycolysis | Glycolysis Regulation |
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Pyruvic acid, the key product of glycolysis, can have many metabolic fates. Under aerobic condition, it forms
1. lactic acid
2. CO2 + H2O
3. acetyl Co-A+ CO2
4. ethanol + CO2
Subtopic: Aerobic Respiration |
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ATP synthesis during oxidative phosphorylation in mitochondria is directly driven by:
| 1. | oxidation of glucose. |
| 2. | electron transport downhill in the ETC. |
| 3. | terminal transfer of electrons to oxygen. |
| 4. | chemiosmosis. |
Subtopic: ETS |
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What process in aerobic respiration generates maximum ATP?
1. substrate-level phosphorylation
2. chemiosmosis
3. Krebs cycle
4. Pyruvate decarboxylation
1. substrate-level phosphorylation
2. chemiosmosis
3. Krebs cycle
4. Pyruvate decarboxylation
Subtopic: Oxidative Phosphorylation |
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When oxygen is not available to a cell, NADH formed during glycolysis:
| 1. | does not undergo any change as there is no need for the cell to regenerate NAD+ |
| 2. | passes electrons to the electron transport system |
| 3. | passes hydrogen atoms to pyruvic acid |
| 4. | passes electrons and hydrogen atoms to acetyl coA |
Subtopic: Fermentation |
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Electrons carried by NADH enter the electron transport system when they are transferred to:
| 1. | FMN | 2. | Ubiquinone |
| 3. | Fe-S | 4. | FAD |
Subtopic: ETS |
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During glycolysis in plant cells, the enzyme hexokinase catalyzes the phosphorylation of:
| I: | Glucose |
| II: | Fructose |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
Subtopic: Glycolysis |
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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 |
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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 |
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