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Page-30 |
Biomolecules |
| 436)Spoilage of oil can be detected by which fatty acid? |
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Linoleic |
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Oleic acid |
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Erucic acid |
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Linolenic acid |
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| 437)Types of RNA polymerase required in nucleus for RNA synthesis are- |
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4 |
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3 |
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2 |
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1 |
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| 438)Which one of the following is a reducing sugar? |
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Galactose |
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Gluconic acid |
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Sucrose |
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None of these |
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| 439)Which one of the following hydrolyses internal phosphodiester bonds in polynucleotide chain- |
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Endonuclease |
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Lipase |
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Protease |
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Exonuclease |
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| 440)Lipids are insoluble in water because lipids molecules are- |
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Neutral |
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Hydrophilic |
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Zwitter ions |
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Hydrophobic |
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| 441)Most abundant organic compound on earth is- |
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Lipids |
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Protein |
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Cellulose |
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Steroids |
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| 442)Cancer cells are more easily damaged by radiation than normal cells because they are- |
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Non-dividing |
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Undergoing rapid division |
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Starved of mutation |
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Different in structure |
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| 443)Due to discovery of which of the following in 1980, the evolution was termed as RNA world- |
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RNA has enzymatic property |
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RNA is not found in all cells |
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m-RNA, t-RNA, r-RNA synthesise proteins |
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In some virus RNA is genetic material |
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| 444)Which form of RNA has a structure resembling clover leaf? |
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m-RNA |
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t-RNA |
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r-RNA |
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hn-RNA |
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| 445)Carbohydrates, the most abundant biomolecules on earth, are produced by - |
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All bacteria, fungi and algae |
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Some bacteria, algae and green plant cells |
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Fungi, algae and green plant cells |
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Viruses, fungi and bacteria |
| Answer : |
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| 446)Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these- |
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are conjugated proteins |
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enhance oxidative metabolism |
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help in regulating metabolism |
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are exclusively synthesised in the body of a living organism as at present |
| Answer : |
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| 447)The catalytic effeciency of two different enzymes can be compared by the- |
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pH optimum value |
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Km value |
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Formation of the product |
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Molecular size of the product |
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| 448)Which of the following statements regarding enzyme inhibition is correct? |
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Non-competitive inhibitors often bind to the enzyme irreversibly |
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Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein |
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Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme |
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Non-competitive inhibition of an enzyme can be overcome by adding large amount of substrate |
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| 449)Which of the following is the simplest amino acid? |
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Glycine |
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Tyrosine |
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Asparagine |
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Alanine |
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| 450)An organic substance bound to an enzyme and essential for its activity is called? |
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Isoenzyme |
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Holoenzyme |
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Apoenzyme |
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Coenzyme |
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