Nucleic Acids - Single MCQs (Page 55)

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Q541. A substrate for enzymes of pyrimidine nucleotide biosynthesis is?...Q542. Methotrexate blocks the synthesis of thymidine monophosphate by inhibiting the a...Q543. Methotrexate blocks the synthesis of thymidine monophosphate by inhibiting the a...Q544. UTP is converted to CTP by?...Q545. d-UMP is converted to TMP by?...Q546. Conversion of deoxyuridine monophosphate to thymidine monophosphate is catalysed...Q547. UDP and UTP are formed by phosphorylation from?...Q548. The first true pyrimidine ribonucleotide synthesized is?...Q549. A cofactor in the conversion of dihydroorotate to orotic acid, catalysed by the ...Q550. The two nitrogen of the pyrimidine ring are contributed by?...