Yes, deoxyribose is the sugar in a DNA nucleotide (ribose is the sugar in RNA). The other components of a nucleotide are a phosphate and a nitrogenous base.
Deoxyribose and phosphate groups form the backbone of the DNA molecule. Uracil is found exclusively in RNA nucleotides.
DNA=> Adenine:Thymine --- Guanine:CytosineRNA=> Adenine:Uracil --- Guanine:Cytosine
Atom, in that DNA is constructed of nucleotides and nucleotides are constructed of atoms.
phosphoraylated nucleosides are called nucleotide