A nucleotide is the building block of nucleic acids. The three parts of a nucleotide include a nitrogenous base, a pentose sugar and a phosphate group.
An important difference between ribonucleotide and deoxyribonucleotide is that the ribonucleotide is the precursor molecule of RNA while the deoxyribonucleotide is the precursor molecule of DNA.
Additionally, a ribonucleotide contains a ribose sugar while a deoxyribose sugar is present in a deoxyribonucleotide. Ribonucleotides also have a hydroxyl group on the 2' -position in the ribose.
There are two types of nitrogenous bases- Purines (Adenine and Guanine) and Pyrimidines (Cytosine, Uracil and Thymine). Cytosine is common for both DNA and RNA and Thymine is present in DNA. Uracil is present in RNA at the place of Thymine.
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