The parts of a nucleotide are the phosphate group, pentose sugar, and a nitrogenous base. The pentose is a ribose molecule in the case of RNA and deoxyribose in the case of DNA. The only difference between ribose and deoxyribose is that ribose at carbon 2' has an OH group while deoxyribose has an H group. Regarding the phosphate groups, no matter if we are talking about DNA or RNA, both have 1 phosphate groups distributed as shown in the image. And finally, the nitrogenous base gives the name to the nucleotide and therefore varies depending on the nucleotide. The nitrogenous bases are adenine, guanine, cytosine, and thymine in the case of DNA, and adenine, guanine, cytosine, and uracil in the case of RNA.
