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Q. No.The enzyme commission number of an enzyme 'X' is 2.3.1.4. 'X' belongs to a class of enzymes that catalyses:
1.
NAD+ + 2H+ + 2e- \(\longrightarrow\) NADH + H+
2.
S - G + S1 \(\longrightarrow\) S + S1 - G
3.
X - C - C - Y \(\longrightarrow\) X - Y + C = C
4.
A - B + H2O \(\longrightarrow\) A - OH + B - H
Subtopic: Enzymes Classification |
61%
Level 2: 60%+
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Prosthetic groups are distinguished from other cofactors in that they:
1. Only I is true
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | are organic compounds. |
| II: | are tightly bound to the apoenzyme. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Enzyme Cofactors |
Level 3: 35%-60%
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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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The skeletal formula (showing numbering convention for substituent groups) of a simple aromatic ring shown below will be a part of the structure of all the following except:
| 1. | Thymine | 2. | Cytosine |
| 3. | Uracil | 4. | Adenine |
Subtopic: Nucleic Acid: Nucleotides |
58%
Level 3: 35%-60%
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Consider the given two statements:
| Assertion (A): | High temperature destroys enzymatic activity. |
| Reason (R): | Enzymes generally function in a narrow range of temperatures. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but the (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Factors Affecting Enzyme Catalysis Reaction |
Level 3: 35%-60%
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Primary proteins are also known as polypeptides, because:
1. they are linear chains.
2. they are polymers of peptide monomers.
3. successive amino acids are joined by peptide bonds.
4. they can assume many conformations.
1. they are linear chains.
2. they are polymers of peptide monomers.
3. successive amino acids are joined by peptide bonds.
4. they can assume many conformations.
Subtopic: Proteins |
56%
Level 3: 35%-60%
NEET - 2022
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Which of the following is wrong with respect to 'biomolecules'?
Choose the correct answer from the options given below:
1. D & E only
2. A & D only
3. A, B & D only
4. B, E & C only
| A. | Cellulose and starch can hold I2 due to formation of helical secondary structures |
| B. | Proteins transport nutrient across cell membrane and fight infectious organisms |
| C. | At high temperature, enzymes get damaged while inorganic catalysts work efficiently |
| D. | In animal tissue, different drugs, pigments, essential oil, magnesium, O2 compounds are noticed |
| E. | DNA and RNA have three chemically distinct components - heterocyclic, monosaccharides and phosphates. |
1. D & E only
2. A & D only
3. A, B & D only
4. B, E & C only
Subtopic: Proteins | Carbohydrates | Enzymes |
55%
Level 3: 35%-60%
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| 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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The molecule given in the figure is a:
| 1. | Triose sugar | 2. | Fatty acid |
| 3. | Gamma amino acid | 4. | Three carbon alcohol |
Subtopic: Lipids |
50%
Level 3: 35%-60%
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements choose the correct answer from the options given below:
| Assertion (A): | Lipids are macromolecules |
| Reason (R): | They have a molecular weight range of ten thousand Daltons and above. |
| 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: Element Analysis |
57%
Level 3: 35%-60%
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