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| 481)Which of the following nueleotide is not present in the structure of DNA? | |||
| Thymidylic acid | Adenylic acid | ||
| Guanylic acid | Uridylic acid | ||
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| 482)Which of the following set consists of non-reducing disaccharides? | |||
| Sucrose of thehalose | Maltose and cellobiose | ||
| Sucrose and cellobiose | Sucrose and galactose | ||
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| 483)Maximum amount of cellulose present in - | |||
| Cotton fibre | Wood | ||
| Exoskeleton of arthopods | Human body | ||
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| 484)Which of the following bond is present between the phosphate and hydroxyl group of sugar? | |||
| Peptide bond | Ester bond | ||
| Hydrogen bond | Glycosidic bond | ||
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| 485)Which of the following derivative of cellulose is used as artificial silk? | |||
| Cellulose nitrate | Cellulose acetate | ||
| Cellulose xanthate | Carboxymethyl cellulose | ||
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| 486)At very high temperature, the enzymes are - | |||
| Highly effective | Killed | ||
| Denatured | Inactivated | ||
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| 487)Which one of the following is optically inactive? | |||
| Tyrosine | Tryptophan | ||
| Alanine | Glycine | ||
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| 488)A triglyceride has 3 fatty acids. The number of fatty acids in the phospholipid lecithin is - | |||
| 0 | 1 | ||
| 2 | 3 | ||
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| 489)Enzymes which have similar substrate activity but different molecular structure are called - | |||
| Coenzyme | Isoenzyme | ||
| Holoenzyme | Homoenzyme | ||
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| 490)Which of the following is universal energy carrier? | |||
| Adenosine triphosphate | Adenosine monophosphate | ||
| Adenosine diphosphate | Uridylic acid | ||
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| 491)Enzymes such as hexokinage have more than one polypeptide chain. These chains are linked to each other by disulphide bonds between - | |||
| Cysteine and cysteine | Cysteine and alanine | ||
| Methionine and histidine | Cysteine and glutamic acid | ||
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| 492)Polysaccharides are component of - | |||
| Cell wall of fungi | Cell wall of plants | ||
| Exoskeleton of arthopods | All of these | ||
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| 493)Haem is the prosthetic group fr which of the following enzymes? | |||
| Carboxy peptidase | Catalase | ||
| Peroxidase | Both (b) and (c) | ||
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| 494)Mark the correct statement with respect to allosteric inhibition - | |||
| It is irreversible | Do not show typical Km constant | ||
| Inhibitor has structural similarity with substrate | Conformation of enzyme is not changed | ||
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| 495)Enzymes are similar to inorganic catalysts in all respect except - | |||
| In being macromolecular and in size more sensitive to high temperature and high pressure | Remainining unchanged in amount, structure and composition during reaction | ||
| Acclerating the rate of reaction | Reversibility of reaction | ||
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