25. Enzymes belong to which class of compounds ? (a) Polysaccharides (b) Polypeptides (c) Polynitro heterocyclic compounds (d) Hydrocarbons 26. Which of the following base is not present in RNA ? (a) Thymine (b) Uracil (c) Adenine (d) Guanine 27. The sequence of bases on m-RNA molecule, synthesized on the GCATA strand of DNA is : (a) CGUAU (b) CGTAT (c) TACGC (d) ATCGC
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