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Q. No.Lenticels present in woody trees help in
1. Exchange of gases and transpiration.
2. Exchange of gases and guttation.
3. Only exchange of gases.
4. Elimination of exudates.
Subtopic: Introduction |
57%
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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 |
52%
From NCERT
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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 |
52%
From NCERT
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That glycolysis is an ancient metabolic process is evidenced in the fact that:
1. it yields large number of ATP molecules
2. it does not directly use oxygen
3. it occurs virtually in all cells
4. it takes place in the cytoplasm
1. it yields large number of ATP molecules
2. it does not directly use oxygen
3. it occurs virtually in all cells
4. it takes place in the cytoplasm
Subtopic: Glycolysis |
50%
From NCERT
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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 |
55%
From NCERT
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What percent of net ATP molecules produced in glycolysis are a result of substrate level phosphorylation?
1. 25
2. 50
3. 75
4. 100
1. 25
2. 50
3. 75
4. 100
Subtopic: Glycolysis |
From NCERT
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Phosphofructokinase (PFK) is a key regulatory enzyme in the glycolytic pathway. Which molecule acts as an allosteric inhibitor of PFK, thereby regulating the rate of glycolysis?
1. ADP
2. AMP
3. ATP
4. NAD+
1. ADP
2. AMP
3. ATP
4. NAD+
Subtopic: Glycolysis Regulation |
58%
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What would be true when comparing the processes of anaerobic respiration and fermentation?
| I. | Both processes do not use oxygen. |
| II. | An electron transport chain is used in anaerobic respiration but not in fermentation. |
| 1. | Only I | 2. | Only II |
| 3. | Neither I nor II | 4. | Both I and II |
Subtopic: Fermentation |
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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 |
From NCERT
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Consider the given two statements:
| Assertion (A): | Fermentation is a type of anaerobic respiration where glucose is partially oxidized to produce energy. |
| Reason (R): | Fermentation results in the production of ethanol or lactic acid without the use of oxygen. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True, (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Fermentation |
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