Nucleotide databases are specialized repositories that store sequences of nucleotides, the building blocks of DNA and RNA. These databases allow researchers to access, analyze, and compare genetic information from various organisms. Examples of nucleotide databases include GenBank, EMBL, and DDBJ, which provide valuable resources for studying genetics, evolution, and molecular biology. Researchers use nucleotide databases to identify genes, study genetic variations, and understand evolutionary relationships. By providing a centralized location for nucleotide sequences, these databases facilitate collaboration and data sharing among scientists worldwide. This accessibility accelerates discoveries in fields such as genomics and bioinformatics.