inal Examination 51) generated by nitrogen fixing bacteria associated with some
ID: 303126 • Letter: I
Question
inal Examination 51) generated by nitrogen fixing bacteria associated with some species of plants is uned directly to synthesine the amino acids gdutamic acid and glutamine. bj Ammonia c) Nitrogen d) Nitraces el Nitrites $2) in the synthesis of amino acids in bacteria and human cells, the primary amine is added late in the synthetic pathway, after the amino acid backbone has been synthesized, by a class of a) Amido transferases b) Amidases d Nitrogenases d) Aminases 531 Folates are a class of single carbon carriers in cells that are cofactors for many enzyme reactions that catalyze addition of carbon groups to substrates. Examples of reactions that require a single carbon carrier folate include: a) Methylation of DNA b) Synthesis of thymidylate c) Epinephrine synthesis d) Modification of tRNA molecules e) All except B 54) IMP is the metabolic intermediate where purine biosynthesis branches for synthesis of a] AMP and GMP b) UMP and CTP cATP and TTP d] GMP and CMP )UTP and ATP SS) The enrme ribonucleotide reductase catalyzes the synthesis of deoxyribonucleotide diphosphates from ) Purine and pyrimidine ribonucleotide monophosphates bl Purine and pyrimidine ribonucleotide diphosphates Purine and pyrimidine ribonucleotide triphosphates d] A and B e) Band CExplanation / Answer
51. Ammonia is the generated during nitrogen fixation by bacteria that act as precursor to glutamic acid and glutamine. Hence, correct option is b.
52. Aminases are the enzyme. Hence, option d is correct .
54. IMP is the metabolic intermediate between AMP and GMP. Hence, option a is correct.
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