Q. No.What process in aerobic respiration generates maximum ATP?
1.
substrate-level phosphorylation
2.
chemiosmosis
3.
Krebs cycle
4.
Pyruvate decarboxylation
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Consider the steps of glycolysis given in the diagram:
Regarding reaction 2 in the diagram:
| I: | Fructose can also enter the glycolytic pathway by phosphorylation at this point. |
| II: | Under conditions of high F6P concentration, this reaction readily runs in reverse. |
1. Only I is true
2. Only II is true
3. Both I and II are true
4. Both I and II are false
Consider the steps of glycolysis given in the diagram:
Regarding reaction 3 in the diagram:
| I: | The reaction is a key regulatory point and is also the rate-limiting step. |
| II: | The reaction is freely reversible. |
1. Only I is true
2. Only II is true
3. Both I and II are true
4. Both I and II are false
In aerobic respiration, oxygen acts as:
| I: | Terminal electron acceptor |
| II: | Terminal proton acceptor |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
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is produced in
| 1. | glycolysis | 2. | the oxidation of pyruvate |
| 3. | the Krebs cycle | 4. | the electron transport chain |
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NADH is produced during
I. glycolysis
II. the oxidation of pyruvate
III. the Krebs cycle
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
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Consider the steps of glycolysis given in the diagram:
It is advantageous that in reaction 5 DHAP is isomerized to G3P because:
1. G3P has more energy than DHAP
2. DHAP is highly toxic
3. Regulation of the pathway becomes easy
4. DHAP is unstable and breaks down to Acetyl CoA
What percentage of ATP formed in a glycolytic pathway is formed by substrate-level phosphorylation?
| 1. | 0% | 2. | 3.5% |
| 3. | 32% | 4. | 100% |
By the end of glycolysis, most of the original energy in the glucose molecule is:
1. utilized to form ATP.
2. retained in the pyruvate.
3. stored in the NADH produced.
4. lost as heat.
Krebs cycle is also called as:
| 1. | glycolysis | 2. | fermentation |
| 3. | Calvin cycle | 4. | the citric acid cycle |
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