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| 466)Transitio state structure of the substrate formed during an enzymatic reaction is- | |||
| Permanent and stable | Transient and unstable | ||
| Permanent but unstable | Transient but stable | ||
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| 467)Select the option which is not correct with respect to enzyme action- | |||
| Addition of lot of succinate does not reverse the inhibition of succinic dehydrogenaseby malinate | Malonate is a competitive inhibitor of succinic dehydrogenase | ||
| A non-competitive inhibitor binds the enzyme at a site distinct from that which binds the substrate | Substrate binds with enzyme at its active site | ||
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| 468)Which one of the following is a disaaharide? | |||
| Ribose | Fructose | ||
| Maltose | Glucose | ||
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| 469)Which of the following is a coenzyme? | |||
| Mucus | NAD+ | ||
| Lyase | Fe++ | ||
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| 470)First enzyme to be isolated in pure crystalline form was- | |||
| Diastase | Invertase | ||
| Zymase | Urease | ||
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| 471)Which of the following are not polymeric? | |||
| Polysaccharides | Nucleic acids | ||
| Proteins | Lipids | ||
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| 472)A typical fat molecule is made up of- | |||
| One glycerol and three fatty acid molecules | Three glycerol molecules and one fatty acid molecule | ||
| Three glycerol molecules and three fatty acid molecules | One glycerol molecule and one fatty acid molecule | ||
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| 473)Which one of the following statements is correct, with reference to enzymes? | |||
| Coenzyme = Apoenzyme + Holoenzymes | Holoenzyme = Apoenzyme + Coenzyme | ||
| Apoenzyme = Holoenzyme + Coenzyme | Holoenzyme = Coenzyme + Co-factor | ||
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| 474)The amino acid Tryptophan is the precursor for the synthesis of - | |||
| Melatonin and serotonin | Cortisol and cortisone | ||
| Thyroxine and triodothyronine | Estrogen and progesterone | ||
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| 475)Glucose is a hexose. Which one of the following is another hexose. | |||
| Ribose | Fructose | ||
| Erythrose | Ribulose | ||
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| 476)Which one of the following is an amino acid? | |||
| Glycolic acid | Formic acid | ||
| Glycine | Glycerol | ||
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| 477)When one adds a phosphate group to a nucleoside one gets another acid soluble biomolecule called - | |||
| Adenine | Sugar phosphate | ||
| Nitrogen base | Nucleotide | ||
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| 478)While a nucleic acid like DNA and RNA is made of only 4 types of nucleotide monomers, proteins are made of - | |||
| 20 types of monomers | Only one type of monomer | ||
| 40 types of monomers | 30 types of monomers | ||
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| 479)Which one of the following represents an additional function that some proteins discharge? | |||
| Pigment making colours of flowers | Hormones | ||
| Antibiotics | Pigment conferring colour to skin | ||
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| 480)The number of ends in a glycogen molecule would be - | |||
| Equal to the number of branch points | One | ||
| Equal to the number of branches plus one | Two, one on the left side and another on the right side | ||
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