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Subtopic: Amino Acids |
88%
Level 1: 80%+
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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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Prosthetic groups are distinguished from other cofactors in that they are:
1. tightly bound to the apoenzyme
2. inorganic compounds
3. metal ions
4. vitamins
1. tightly bound to the apoenzyme
2. inorganic compounds
3. metal ions
4. vitamins
Subtopic: Enzyme Cofactors |
91%
Level 1: 80%+
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Given below are two statements:
| Assertion (A): | Cellulose does not give positive iodine test. |
| Reason (R): | Cellulose lacks complex helices and cannot hold I2. |
| 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: Cellulose, Chitin, Inulin & Agar |
93%
Level 1: 80%+
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Given below are two statements:
| Assertion (A): | After Vmax is attained, there is no further rise in reaction velocity of an enzyme inspite of increase in substrate concentration. |
| Reason (R): | At Vmax, there are no free active sites on enzymes to bind with substrate molecules. |
| 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: Factors Affecting Enzyme Catalysis Reaction |
90%
Level 1: 80%+
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If the elemental analysis is done on a sample of human cheek cells, we observe the list of elements that are also present in Earth's crust.
It is also observed that there is certain difference in the percentage of respective elements.
Choose the correct difference among the following options.
It is also observed that there is certain difference in the percentage of respective elements.
Choose the correct difference among the following options.
| 1. | Relative abundance of carbon and calcium w.r.t. other elements is higher in Earth's crust that human body. |
| 2. | There is a significant high amount of nitrogen and silicon in both. |
| 3. | Relative abundance of carbon and hydrogen w.r.t. other elements is higher in human body than in earth's crust. |
| 4. | Silicon and sulphur are least abundant in Earth's crust and human body respectively. |
Subtopic: Element Analysis |
82%
Level 1: 80%+
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Amino acids are substituted methanes. There are 20 types of amino acids and all of them contain a single asymmetric carbon, except in:
| 1. | Glycine | 2. | Proline |
| 3. | Lysine | 4. | Cysteine |
Subtopic: Amino Acids |
80%
Level 1: 80%+
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Consider the pie chart given below w.r.t. average composition of substances in cells.
Identify the component A, B, C, D and E. Select the correct option.
Identify the component A, B, C, D and E. Select the correct option.
| 1. | A= Water ; B=Carbohydrates ; C=Proteins ; D=Nucleic acids ; E=Lipids |
| 2. | A=Proteins ; B=Water ; C=Carbohydrates ; D=Lipids ; E=Nucleic acids |
| 3. | A=Water ; B=Proteins ; C=Nucleic acids ; D=Carbohydrates ; E=Lipids |
| 4. | A=Proteins ; B=Carbohydrates ; C=Nucleic acids ;D=Lipids E=Nucleic |
Subtopic: Element Analysis |
87%
Level 1: 80%+
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Match the items w.r.t. secondary metabolites.
Select the correct option.
1. (i) → (b); (ii) → (a); (iii) → (d); (iv) → (c)
2. (i) → (b); (ii) → (d); (iii) → (c); (iv) → (a)
3. (i) → (b); (ii) → (a); (iii) → (c); (iv) → (d)
4. (i) → (d); (ii) → (b); (iii) → (a); (iv) → (c)
| (i) | Cellulose | (a) | Provides yellow/orange color to plants, algae, etc. |
| (ii) | Carotenoids | (b) | Structural component of plant cell wall |
| (iii) | Abrin | (c) | An opiate alkaloid |
| (iv) | Morphine | (d) | Toxic protein obtained from a plant |
1. (i) → (b); (ii) → (a); (iii) → (d); (iv) → (c)
2. (i) → (b); (ii) → (d); (iii) → (c); (iv) → (a)
3. (i) → (b); (ii) → (a); (iii) → (c); (iv) → (d)
4. (i) → (d); (ii) → (b); (iii) → (a); (iv) → (c)
Subtopic: Primary & Secondary Metabolites |
92%
Level 1: 80%+
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The two strands of polynucleotides in a DNA double helix:
| I. | are identical. |
| II. | are complementary. |
| III. | are parallel. |
| IV. | are antiparallel. |
| 1. | Only I and II are correct |
| 2. | Only III and IV are correct |
| 3. | Only I and III are correct |
| 4. | Only II and IV are correct |
Subtopic: The DNA |
93%
Level 1: 80%+
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