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Q. No.Chitin:
I:
is a long-chain polymer of N-acetylglucosamine.
II:
is a primary component of cell walls in fungi.
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: 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%
From NCERT
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Match the polysaccharide with its correct function:
1. Only I, II and III
2. Only I, III and IV
3. Only II, III and IV
4. I, II, III and IV
| I. | Starch | - | Storage of glucose in plants |
| II. | Glycogen | - | Storage of glucose in animals |
| III. | Cellulose | - | Structural component of plant cell walls |
| IV. | Chitin | - | Structural component in fungal cell walls and exoskeletons of insects |
2. Only I, III and IV
3. Only II, III and IV
4. I, II, III and IV
Subtopic: Carbohydrates: Starch & Glycogen | Carbohydrates: Cellulose, Chitin, Inulin & Agar |
96%
From NCERT
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At physiological pH, the amino acid exists as a zwitter ion because:
| 1. | It has no net charge. |
| 2. | It has a positive and a negative charge at different parts of the molecule. |
| 3. | It can donate a proton to the surrounding medium. |
| 4. | It can accept a proton from the surrounding medium. |
Subtopic: Zwitter ion & Peptide Bond |
88%
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Consider the given two statements:
| Assertion (A): | Glycogen has one reducing end. |
| Reason (R): | The reducing end is where non-reducing sugars can be added to the glycogen molecule. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Carbohydrates: Starch & Glycogen |
57%
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%
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Which statement about lipids is correct?
| 1. | Lipids are primarily polar and hydrophilic. |
| 2. | Lipids are polymers of amino acids. |
| 3. | Lipids are generally insoluble in water but soluble in organic solvents. |
| 4. | Lipids are made of glycerol and three phosphate groups. |
Subtopic: Lipids |
85%
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