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Q. No.Identify the correct statements about biomolecules.
Choose the correct answer from the options given below:
| A. | Lipids are generally water-soluble. |
| B. | Proteins are polypeptides |
| C. | Polysaccharides are long chains of sugars. |
| D. | Adenine and guanine are substituted pyrimidines. |
| E. | Almost all enzymes are proteins. |
Choose the correct answer from the options given below:
| 1. | C, D and E only |
| 2. | B, C and E only |
| 3. | B, D and E only |
| 4. | A, B and C only |
Subtopic: Miscellaneous |
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Level 2: 60%+
NEET - 2026
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Alpha-helix is found in which level of protein structure ?
| 1. | Quaternary structure | 2. | Tertiary structure |
| 3. | Primary structure | 4. | Secondary structure |
Subtopic: Structural Organisation of Proteins |
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Which of the following statements are correct regarding amino acids?
Choose the correct answer from the options given below:
| A. | They are substituted methanes. |
| B. | Serine is an aromatic amino acid |
| C. | Valine is a neutral amino acid. |
| D. | Lysine is an acidic amino acid. |
| 1. | C and D only | 2. | A and B only |
| 3. | A and C only | 4. | B and C only |
Subtopic: Amino Acids |
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Match List-I with List-II:
Choose the correct answer from the options given below:
1. A-III, B-IV, C-II, D-I
2. A-I, B-II, C-III, D-IV
3. A-III, B-II, C-IV, D-I
4. A-IV, B-III, C-II, D-I
| List-I | List-II | ||
| A. | Trypsin | I. | Intercellular ground substance |
| B | Morphine | II. | Lectin |
| C | Concanavalin | III. | Enzyme |
| D | Collagen | IV. | Alkaloid |
Choose the correct answer from the options given below:
1. A-III, B-IV, C-II, D-I
2. A-I, B-II, C-III, D-IV
3. A-III, B-II, C-IV, D-I
4. A-IV, B-III, C-II, D-I
Subtopic: Miscellaneous |
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NEET - 2026
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The following reaction depicts the activity of a particular class of enzymes :
X Y
| |
C - C E \(\xrightarrow{\mathrm{E}}\) X- Y + C = C
(Substrate) (Product) (Product)
Identify the enzyme class 'E' from the following options :
X Y
| |
C - C E \(\xrightarrow{\mathrm{E}}\) X- Y + C = C
(Substrate) (Product) (Product)
Identify the enzyme class 'E' from the following options :
| 1. | Ligases | 2. | Lyases |
| 3. | Isomerases | 4. | Transferases |
Subtopic: Enzymes Classification |
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The protein portion of an enzyme is called:
| 1. | Apoenzyme | 2. | Prosthetic group |
| 3. | Cofactor | 4. | Coenzyme |
Subtopic: Enzyme Cofactors |
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NEET - 2025
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Match List-I with List-II:
Choose the option with all correct matches.
| List-I | List-II | ||
| A. | Adenosine | I. | Nitrogen base |
| B. | Adenylic acid | II. | Nucleotide |
| C. | Adenine | III. | Nucleoside |
| D. | Alanine | IV. | Amino acid |
| 1. | A-III, B-II, C-I, D-IV | 2. | A-II, B-III, C-I, D-IV |
| 3. | A-III, B-IV, C-II, D-I | 4. | A-III, B-II, C-IV, D-I |
Subtopic: Nucleic Acid | Amino Acids |
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Which one of the following enzymes contains 'Haem' as the prosthetic group?
1. Succinate dehydrogenase
2. Catalase
3. RuBisCo
4. Carbonic anhydrase
1. Succinate dehydrogenase
2. Catalase
3. RuBisCo
4. Carbonic anhydrase
Subtopic: Enzyme Cofactors |
Level 3: 35%-60%
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Name the class of enzyme that usually catalyze the following reaction :
\(\mathrm{S}-\mathrm{G}+\mathrm{S}^{\#} \rightarrow \mathrm{~S}+\mathrm{S}^{\#}-\mathrm{G}\)
Where, G → a group other than hydrogen
S → a substrate
\(S^\#\) → another substate
\(\mathrm{S}-\mathrm{G}+\mathrm{S}^{\#} \rightarrow \mathrm{~S}+\mathrm{S}^{\#}-\mathrm{G}\)
Where, G → a group other than hydrogen
S → a substrate
\(S^\#\) → another substate
| 1. | Transferase | 2. | Ligase |
| 3. | Hydrolase | 4. | Lyase |
Subtopic: Enzymes Classification |
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Lecithin, a small molecular weight organic compound found in living tissues, is an example of:
1. Phospholipids
2. Glycerides
3. Carbohydrates
4. Amino acids
1. Phospholipids
2. Glycerides
3. Carbohydrates
4. Amino acids
Subtopic: Lipids |
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Level 1: 80%+
NEET - 2024
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