What should be added to a nucleoside to yield a nucleotide?
1. Sugar
2. Phosphoric acid
3. Nitrogenous base
4. Sugar and nitrogenous base
Subtopic: Â Nucleic Acid: Nucleotides |
 90%
Level 1: 80%+
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Study the following statements :
Select the option which includes all correct statements :
| a. | The substrate binds to the active site of the enzyme. |
| b. | Enzymes isolated form thermophilic organisms get denatured at 50o C. |
| c. | The active site of enzyme breaks the chemical bonds of the product. |
| d. | Prosthetic groups are tightly bound to the apoenzyme. |
| 1. | (a) & (c) | 2. | (c) & (d) |
| 3. | (b) & (c) | 4. | (a) & (d) |
Subtopic: Â Enzyme Cofactors |Â Mechanism of Enzymes |
 78%
Level 2: 60%+
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Electron transferring enzymes belong to
1. Transferases
2. Oxidoreductases
3. Lyases
4. Isomerases
1. Transferases
2. Oxidoreductases
3. Lyases
4. Isomerases
Subtopic: Â Enzymes Classification |
 70%
Level 2: 60%+
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Match the following and select the correct option:
1. i-a, ii-c, iii-d
2. i-a, ii-b, iii-c
3. i-b, ii-c, iii-d
4. i-c, ii-d, iii-a
| Column I | Column II | ||
| i. | Simple lipids | a. | Cholesterol |
| ii. | Compound lipids | b. | Vanaspati ghee |
| iii. | Sterols | c. | Glycerol |
| d. | Lecithin |
2. i-a, ii-b, iii-c
3. i-b, ii-c, iii-d
4. i-c, ii-d, iii-a
Subtopic: Â Lipids |
 83%
Level 1: 80%+
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The curve given below shows enzymatic activity with relation to change in conditions.
What do the axes (X and Y) represent?
What do the axes (X and Y) represent?
| X-axis | Y-axis | |
| 1. | Temperature | Enzymatic activity |
| 2. | Substrate concentration | Enzymatic activity |
| 3. | Enzymatic activity | Temperature |
| 4. | Enzymatic activity | pH |
Subtopic: Â Factors Affecting Enzyme Catalysis Reaction |
 66%
Level 2: 60%+
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Match the following and select the correct option.
1. i-q, ii-s, iii-r, iv-p
2. i-q, ii-p, iii-s, iv-r
3. i-p, ii-q, iii-r, iv-s
4. i-r, ii-s, iii-p, iv-q
| Column I | Column II | ||
| i. | Lipid | p. | Glutamic acid |
| ii. | Amino acid | q. | Glycerol |
| iii. | Protein | r. | Starch |
| iv. | Carbohydrate | s. | Collagen |
2. i-q, ii-p, iii-s, iv-r
3. i-p, ii-q, iii-r, iv-s
4. i-r, ii-s, iii-p, iv-q
Subtopic: Â Amino Acids |
 91%
Level 1: 80%+
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Match the following lists:
1. i-a, ii-c, iii-b, iv-d
2. i-d, ii-a, iii-c, iv-b
3. i-c, ii-d, iii-a, iv-b
4. i-c, ii-b, iii-d, iv-a
| List I | List II | ||
| i. | Lyases | a. | Enzymes catalyzing hydrolysis of ester ether, peptide, glycosidic, \(C-C\), \(C-\)halide or \(P-N\) bonds |
| i. | Ligases | b. | Enzymes catalyzing a transfer of a group G between a pair of substrate \(S\) and \(S'\) |
| ii. | Hydrolases | c. | They catalyse removal of groups from substrate by mechanisms other than hydrolysis leaving double bonds. |
| iv. | Transferases | d. | They catalyse the linking together of 2 compounds |
2. i-d, ii-a, iii-c, iv-b
3. i-c, ii-d, iii-a, iv-b
4. i-c, ii-b, iii-d, iv-a
Subtopic: Â Enzymes Classification |
 75%
Level 2: 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: Â Nucleic Acid: Nucleotides |
 60%
Level 2: 60%+
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The nitrogenous bases of the two strands of DNA are joined by
1. Phosphodiester bond
2. Hydrogen bond
3. Glycosidic bond
4. Peptide bond
1. Phosphodiester bond
2. Hydrogen bond
3. Glycosidic bond
4. Peptide bond
Subtopic: Â Nucleic Acid |
 62%
Level 2: 60%+
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An example of protein with quaternary structure is
1. Myoglobin
2. Haemoglobin
3. Keratin
4. All of these
1. Myoglobin
2. Haemoglobin
3. Keratin
4. All of these
Subtopic: Â Proteins |
 78%
Level 2: 60%+
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