The protein portion of an enzyme is called:
1. Apoenzyme 2. Prosthetic group
3. Cofactor 4. Coenzyme
Subtopic:  Enzyme Cofactors |
 72%
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NEET - 2025
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Match List-I with List-II:
List-I List-II
A. Adenosine  I. Nitrogen base
B. Adenylic acid II. Nucleotide
C. Adenine III. Nucleoside
D. Alanine    IV. Amino acid
Choose the option with all correct matches.
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 |
 74%
From NCERT
NEET - 2025
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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
Subtopic:  Enzyme Cofactors |
From NCERT
NEET - 2025
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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 
1. Transferase 
2. Ligase
3. Hydrolase
4. Lyase
Subtopic:  Enzymes Classification |
 77%
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NEET - 2025
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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
Subtopic:  Lipids |
 81%
From NCERT
NEET - 2024
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Inhibition of Succinic dehydrogenase enzyme by malonate is a classical example of:
1. Feedback inhibition
2. Competitive inhibition
3. Enzyme activation
4. Cofactor inhibition
Subtopic:  Enzyme Inhibition |
 80%
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The cofactor of the enzyme carboxypeptidase is:
1. Niacin
2. Flavin
3. Haem
4. Zinc
Subtopic:  Enzyme Cofactors |
 70%
From NCERT
NEET - 2024
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Match List I with List II:
List I List II
A.  GLUT-4 I. Hormone 
B.  Insulin  II. Enzyme
C.  Trypsin  III. Intercellular ground substance 
D.  Collagen  IV. Enables glucose transport into cells

Choose the correct answer from the options given below: 
1. A-I, B-II, C-III, D-IV
2. A-II, B-III, C-IV, D-I
3. A-III, B-IV, C-I, D-II
4. A-IV, B-I, C-II, D-III
Subtopic:  Proteins |
 86%
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NEET - 2024
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Regarding catalytic cycle of an enzyme action, select the correct sequential steps: 
A. Substrate enzyme complex formation.
B. Free enzyme ready to bind with another substrate.
C. Release of products. 
D. Chemical bonds of the substrate broken.
E. Substrate binding to active site. 
Choose the correct answer from the options given below: 
1. A, E, B, D, C 
2. B, A, C, D, E
3. E, D, C, B, A 
4. E, A, D, C, B 
Subtopic:  Enzyme Catalysis | Factors Affecting Enzyme Catalysis Reaction | Mechanism of Enzymes |
 74%
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Which of the following statement is incorrect about enzymes?
1. They are highly substrate specific
2. In thermophilic organisms, enzymes can catalyze reaction at high temperatures, i.e. 90°C
3. All enzymes are proteinaceous in nature
4. Some enzymes have metal ions
Subtopic:  Enzymes |
 75%
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NEET - 2024
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