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Q. No.Which group of enzymes catalyze the chemical reaction where there is linking together of two compounds?
1. Lyases
2. Transferases
3. Isomerases
4. Ligases
Subtopic: Enzymes Classification |
90%
From NCERT
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Consider the given two statements:
| Assertion (A): | The effect of competitive inhibition can be overcome by increasing the substrate of the enzyme. |
| Reason (R): | The presence of a competitive inhibitor can decrease the rate of enzyme-catalyzed reaction by blocking the substrate from binding to the enzyme. |
| 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 but (R) is False |
| 4. | (A) is False but (R) is True |
Subtopic: Enzyme Inhibition: Introduction | Enzyme Inhibition |
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Which of the following describes the substrate concentration at which an enzyme-catalyzed reaction achieves half Vmax?
1. Km value
2. Kcat value
3. pKa value
4. Q10
Subtopic: Factors Affecting Enzyme Catalysis Reaction |
94%
From NCERT
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Consider the given two statements
| Assertion (A): | In the absence of carbonic anhydrase, carbon dioxide will not react with water to produce carbonic acid. |
| Reason (R): | Enzymes are the cause for the reactions to take place. |
| 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. | (A) is False, (R) is False. |
Subtopic: Enzymes |
65%
From NCERT
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Chitin:
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: | is a long-chain polymer of N-acetylglucosamine. |
| II: | is a primary component of cell walls in fungi. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Carbohydrates: Cellulose, Chitin, Inulin & Agar |
94%
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Consider the given two statements:
1. Only I is true.
2. Only II is true.
3. Both I and II are true.
4. Neither I nor II are true.
| I: | All enzymes are proteins. |
| II: | All proteins are enzymes. |
2. Only II is true.
3. Both I and II are true.
4. Neither I nor II are true.
Subtopic: Enzymes |
55%
From NCERT
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Which of the following best describes the role of secondary metabolites in plants?
| 1. | They are primarily involved in growth and development. |
| 2. | They are essential for the plant's primary metabolic processes. |
| 3. | They play a key role in the plant's defense mechanisms. |
| 4. | They are directly involved in photosynthesis. |
Subtopic: Primary & Secondary Metabolites |
88%
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Which of the following is not a component of a nucleotide?
1. Phosphate group
2. Ribose sugar
3. Fatty acid
4. Nitrogenous base
1. Phosphate group
2. Ribose sugar
3. Fatty acid
4. Nitrogenous base
Subtopic: Nucleic Acid |
95%
From NCERT
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Consider the given two statements:
| Assertion (A): | In competitive enzyme inhibition, the inhibitor binds to the active site of the enzyme, preventing the substrate from binding. |
| Reason (R): | Competitive inhibitors structurally resemble the substrate, allowing them to bind reversibly to the active site and reduce the enzyme's activity without affecting the maximal velocity (Vmax) of the reaction. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True and (R) does not correctly explain (A) |
| 3. | (A) is True, (R) is False |
| 4. | (A) is False, (R) is True |
Subtopic: Enzyme Inhibition |
65%
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What are thymidine, uridine, and cytidine?
1. Purines
2. Pyrimidines
3. Nucleosides
4. Nucleotides
1. Purines
2. Pyrimidines
3. Nucleosides
4. Nucleotides
Subtopic: Element Analysis | Nucleic Acid: Nucleotides |
61%
From NCERT
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