- 1(current)
Q. No.A crevice or pocket into which the substrate fits forms the:
1. tertiary structure of an enzyme.
2. active site of an enzyme.
3. tertiary structure of an enzyme.
4. allosteric site on an enzyme.
1. tertiary structure of an enzyme.
2. active site of an enzyme.
3. tertiary structure of an enzyme.
4. allosteric site on an enzyme.
Subtopic: Mechanism of Enzymes | Enzyme Introduction |
91%
From NCERT
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An enzyme catalysed biochemical reaction in a living organism is being carried out at a certain rate at 20°C. If the temperature is raised to 30°C, it is generally expected that the rate:
1. will double
2. will decrease by half
3. will remain the same
4. will become zero and the reaction will stop
1. will double
2. will decrease by half
3. will remain the same
4. will become zero and the reaction will stop
Subtopic: Mechanism of Enzymes | Enzyme Introduction |
75%
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Rate of a physical or chemical process:
I: refers to the amount of product formed per unit time.
II: can also be called velocity if the direction is specified.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
I: refers to the amount of product formed per unit time.
II: can also be called velocity if the direction is specified.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Properties of Enzymes | Mechanism of Enzymes | Enzyme Introduction |
94%
From NCERT
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For an enzyme catalysed metabolic reaction:
I: the formation of an ‘ES’ complex is not obligatory.
II: ‘ES’ complex formation is a transient phenomenon.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
I: the formation of an ‘ES’ complex is not obligatory.
II: ‘ES’ complex formation is a transient phenomenon.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Enzyme Cofactors | Properties of Enzymes | Mechanism of Enzymes | Enzyme Introduction |
81%
From NCERT
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Which mechanism best describes the action of enzymes?
| 1. | Enzymes work by increasing the temperature of substrates. |
| 2. | Enzymes reduce the activation energy needed for a reaction. |
| 3. | Enzymes provide ATP to reactions. |
| 4. | Enzymes permanently change shape after a reaction. |
Subtopic: Enzyme Catalysis | Mechanism of Enzymes |
92%
From NCERT
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Identify the incorrect statement regarding enzyme action:
| 1. | Formation of [Enzyme Substrate] complex is obligatory |
| 2. | Enzymes speed up a chemical reaction by lowering the requirement of activation energy |
| 3. | Substrate need not go through a transition state if the enzyme catalyzed reaction is endothermic |
| 4. | Enzymes are themselves not used up in the chemical reaction catalyzed by them |
Subtopic: Mechanism of Enzymes |
83%
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NEET 2025 - Target Batch
Identify the incorrect statement regarding enzymes:
| 1. | Enzymes generally function in a narrow range of temperature and pH. |
| 2. | Each enzyme shows its highest activity at a particular temperature and a pH called the optimum temperature and the optimum pH. |
| 3. | Activity declines both below and above the optimum value. |
| 4. | Low temperatures denature the enzyme; high temperatures temporarily inactivate the enzyme. |
Subtopic: Properties of Enzymes | Mechanism of Enzymes | Enzyme Introduction |
94%
From NCERT
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