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Q. No.The non protein constituent present in many enzymes is called:
1. Co-enzyme
2. Co-factor
3. Apoenzyme
4. Holoenzyme
Subtopic: Enzyme Cofactors |
70%
Level 2: 60%+
Hints
Haem in hemoglobin:
| 1. | is loosely bound |
| 2. | is the co-enzyme |
| 3. | is the prosthetic group |
| 4. | has no influence on activity of Hb |
Subtopic: Enzyme Cofactors |
84%
Level 1: 80%+
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What is the co-factor for the proteolytic enzyme, carboxypeptidase?
| 1. | Molybdenum | 2. | Manganese |
| 3. | Zinc | 4. | Copper |
Subtopic: Enzyme Cofactors |
86%
Level 1: 80%+
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Subtopic: Enzyme Cofactors |
63%
Level 2: 60%+
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Subtopic: Element Analysis |
70%
Level 2: 60%+
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Which of the following is not an aromatic amino acid?
| 1. Phenylalanine | 2. Threonine |
| 3. Tyrosine | 4. Tryptophan |
Subtopic: Amino Acids |
76%
Level 2: 60%+
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Formation of glycosidic bond represents:
| 1. Dehydration | 2. Hydrolysis |
| 3. Dehydrogenation | 4. Isomerization |
Subtopic: Carbohydrates |
69%
Level 2: 60%+
Hints
Consider the following statements:
| I: | Glycine is the simplest amino acid, with a hydrogen atom as its side chain (R group). |
| II: | Tryptophan is an aromatic amino acid. |
| III: | Lysine is an acidic amino acid. |
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Different Amino Acids |
Level 4: Below 35%
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Many organic substances are negatively charged e.g., acetic acid, while others are positively charged e.g., ammonium ion. An amino acid under certain conditions would have both positive and negative charges simultaneously in the same molecule. Such a form of amino acid is called
1. Positively charged form
2. Negatively charged form
3. Neutral form
4. Zwitter ionic form
1. Positively charged form
2. Negatively charged form
3. Neutral form
4. Zwitter ionic form
Subtopic: Amino Acids |
94%
Level 1: 80%+
Hints
Sugars are technically called carbohydrates, referring to the fact that their formulae are only multiples of C(H2O). Hexose therefore has six carbons, twelve hydrogen and six oxygen atoms. Glucose is a hexose. Choose from among the following another hexose.
| 1. | Fructose | 2. | Erythrose |
| 3. | Ribulose | 4. | Ribose |
Subtopic: Carbohydrates |
82%
Level 1: 80%+
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