An alpha helix is a:
1. primary structure of a protein
2. secondary structure of a protein
3. tertiary structure of a protein
4. quaternary structure of a protein
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The inhibition of succinic dehydrogenase by malonate is an example of:
1. Non-competitive reversible inhibition
2. Non-competitive irreversible inhibition
3. Competitive inhibition
4. Allosteric inhibition
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Consider the following enzymes:
I. Catalase
II. Peroxidase
III. Carboxypeptidase
Which of these enzymes require haem as a co-factor for their activity?
1. | I only | 2. | I and II only |
3. | II and III only | 4. | I, II and III |
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Chitin, a complex polysaccharide, is found in:
1. | Plant cell wall |
2. | The exoskeleton of arthropods and cell walls of most fungi |
3. | Bacterial cell wall |
4. | Cartilage and other connective tissues |
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Consider the following two statements regarding enzyme action:
I: | Co-factors play a crucial role in the catalytic activity of the enzyme. |
II: | Catalytic activity is reduced when the co-factor is removed from the enzyme. |
Of the above statements:
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. I is incorrect but II is correct
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The living state can be best described as a:
1. non equilibrium steady state
2. non equilibrium non steady state
3. equilibrium non steady state
4. equilibrium steady state
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The metal ion that acts as a co-factor for both alcohol dehydrogenase and carbonic anhydrase is:
1. | Magnesium | 2. | Iron |
3. | Zinc | 4. | Nickel |
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When we homogenize any tissues in an acid the acid soluble pool represents
1. | Cytoplasm | 2. | Cell membrane |
3. | Nucleus | 4. | Mitochondria |
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Formation of glycosidic bond represents:
1. Dehydration | 2. Hydrolysis |
3. Dehydrogenation | 4. Isomerization |
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Which of the following is not an aromatic amino acid?
1. Phenylalanine | 2. Threonine |
3. Tyrosine | 4. Tryptophan |
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