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
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Subtopic: Amino Acids |
87%
Level 1: 80%+
Hints
Subtopic: Amino Acids |
84%
Level 1: 80%+
Hints
All the following are examples of basic amino acids except:
| 1. | Lysine | 2. | Histidine |
| 3. | Arginine | 4. | Valine |
Subtopic: Amino Acids |
71%
Level 2: 60%+
Hints
Identify the lipid shown in the given figure:
| 1. Glycerol 2. Fatty acid 3. Sphingosine 4. Cerebroside |
 |
Subtopic: Lipids |
91%
Level 1: 80%+
Hints
Consider the given two statements:
| I: | Palmitic acid has 16 carbons including the carboxyl carbon. |
| II: | Arachidonic acid has 20 carbons including the carboxyl carbon. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Lipids |
89%
Level 1: 80%+
Hints
Consider the given two statements:
| I: | Gingelly oil remains as oil in winters. |
| II: | The fatty acid components of the oil are all saturated. |
| 1. | Both I and II are correct and II correctly explains I |
| 2. | Both I and II are correct but II does not correctly explain I |
| 3. | I is correct but II is incorrect |
| 4. | I is incorrect but II is correct |
Subtopic: Lipids |
63%
Level 2: 60%+
Hints
Which of the following given molecules will be a structural component of the cell membrane in an animal cell?
| I: |  |
| II: |  |
| III: |  |
| IV: |  |
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only III and IV | 4. | I, II, III and IV |
Subtopic: Lipids |
69%
Level 2: 60%+
Hints
Which of the following is the correct structure of a monomer present in the structure of a DNA molecule?
| 1. |  |
2. | .svg) |
| 3. |  |
4. |  |
Subtopic: Nucleic Acid: Nucleotides | The DNA |
72%
Level 2: 60%+
Hints
Consider the given two statements:
| Statement I: | Secondary metabolites derived from plant, fungal and microbial cells do not have a use in human welfare. |
| Statement II: | We do not, at the moment, understand the role or functions of all the secondary metabolites in host organisms. |
| 1. | Both Statement I and Statement II are correct and Statement II correctly explains Statement I |
| 2. | Both Statement I and Statement II are correct but Statement II does not correctly explain Statement I |
| 3. | Statement I is correct but Statement II is incorrect |
| 4. | Statement I is incorrect but Statement II is correct |
Subtopic: Primary & Secondary Metabolites |
81%
Level 1: 80%+
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