<prompt> Deoxy ribonucleic acid is formed from:RibonucleaseRibonucleotide monophosphateRibonucleotide diphosphateRibonucleotide triphosphate  <response>: Ans. C. Ribonucleotide diphosphateRef: Harper 31e page 312Reduction of the 2-hydroxyl of purine and pyrimidine ribonucleotides, catalyzed by the ribonucleotide reductase complex, provides the deoxyribonucleoside diphosphates dNDPs needed for both the synthesis and repair of DNA 