A Nucleotide Sequence Database is a specialized repository that stores sequences of nucleotides, which are the building blocks of DNA and RNA. These databases allow researchers to access, analyze, and compare genetic information from various organisms. They play a crucial role in fields like genomics, molecular biology, and bioinformatics. Common examples of nucleotide sequence databases include GenBank, EMBL, and DDBJ. These databases provide valuable resources for scientists studying genetic variations, evolutionary relationships, and the functions of genes. By sharing nucleotide sequences, researchers can collaborate and advance our understanding of genetics and related disciplines.