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Subtopic: Enzyme Catalysis |
72%
Level 2: 60%+
Hints
The 3' - 5' phosphodiester linkages inside polynudeotide chain serve to join
| 1. | One DNA strand with the other DNA strand |
| 2. | One nucleoside with another nucleoside. |
| 3. | One nucleotide with another nucleotide |
| 4. | One nitrogenous base with pentose sugar |
Subtopic: Enzyme Catalysis |
72%
Level 2: 60%+
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Subtopic: Enzyme Catalysis |
88%
Level 1: 80%+
Hints
Links
In a reaction catalyzed by an enzyme, which of the following statements is correct ?
| 1. | Enzymes decrease the activation energy for formation of transition state. |
| 2. | Enzymes make transition form substrate to product more difficult. |
| 3. | Enzymes increase the activation energy for formation of transition state. |
| 4. | Enzyme-substrate complex formed during a reaction lasts for a very long time. |
Subtopic: Enzyme Catalysis |
85%
Level 1: 80%+
NEET - 2022
Hints
| A. | Release of products of the reaction |
| B. | Binding of substrate to the active site of the enzyme |
| C. | Formation of enzyme-substrate complex |
| D. | Alteration in the shape of the enzyme |
| E. | Enzyme free to bind another molecule of substrate |
1. B > C > D > A > E
2. B > D > C > A > E
3. B > D > A > E > C
4. B > E > D > C > A
Subtopic: Enzymes | Enzyme Catalysis |
57%
Level 3: 35%-60%
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Hints
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Read the statements A and B carefully and select the correct answer.
| Statement A: | Enzyme-substrate complex produced during a catalysed reaction is highly reactive. |
| Statement B: | This complex dissociates into its product and changed enzyme with an intermediate formation of enzyme-product complex. |
| 1. | Both statements A and B are correct |
| 2. | Both statements A and B are incorrect |
| 3. | Only statement A is correct |
| 4. | Only statement A is incorrect |
Subtopic: Enzymes | Enzyme Catalysis |
Level 3: 35%-60%
Hints
Rates of physical and chemical processes are influenced by temperature among other factors. A general rule of thumb is that rate:
| 1. | doubles by half for every 10°C change in either direction |
| 2. | decreases by half for every 10°C change in either direction |
| 3. | doubles or decreases by half for every 10°C change in either direction |
| 4. | doubles or decreases by half for every 5°C change in either direction |
Subtopic: Enzymes | Enzyme Catalysis |
78%
Level 2: 60%+
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In the absence of an enzyme, the catalysed reaction:
| 1. | does not take place |
| 2. | takes place at a very slow rate |
| 3. | takes place at a higher rate |
| 4. | is not affected at all |
Subtopic: Enzymes | Enzyme Catalysis |
85%
Level 1: 80%+
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The number of correct statements from the given statements are:
1. 2
2. 3
3. 4
4. 5
| I: | Almost all enzymes are proteins. |
| II: | Some nucleic acids can behave like enzymes. |
| III: | No enzyme in living organisms can function above 40 °C. |
| IV: | Enzymes are the reason that chemicals react with each other. |
| V: | Enzymes are not sensitive to pH in their environment. |
2. 3
3. 4
4. 5
Subtopic: Enzymes | Enzyme Catalysis | Factors Affecting Enzyme Catalysis Reaction |
Level 3: 35%-60%
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Study the following graph of concept of activation energy given below. Select the correct option for stages labelled A to D.
| A | B | C | D | |
| 1 | Transition State | Potential energy | Activation energy without enzyme | Activation energy with enzyme |
| 2 | Kinetic energy | Potential energy | Activation energy without enzyme | Activation energy with enzyme |
| 3 | Potential energy | Transition state | Activation energy without enzyme | Activation energy with enzyme |
| 4 | Potential energy | Transition state | Activation energy without enzyme | Activation energy with enzyme |
Subtopic: Enzyme Catalysis |
81%
Level 1: 80%+
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