The right answer is: deoxyribose.
Deoxyribose is a sugar, a pentose, that is to say a dye with five carbon atoms. Its formula is C5H10O4. Deoxyribose is derived from ribose, another pentose, by a reduction in the alcohol function of carbon # 2. Deoxyribose and ribose both have a furanose ring, with four carbon atoms and one oxygen atom.
Deoxyribose is part of the nucleotides that make up DNA (deoxyribonucleic acid), the carrier of genetic information in the nucleus of cells, while ribose is present in RNA (ribonucleic acid). In DNA, deoxyribose is associated with one of the four nitrogen bases:
pyrimidines: cytosine C and thymine T,
purines: adenine A and guanine G.
