The Role of DNA Sequencing in Modern Biological Research

Abstract

DNA sequencing is a fundamental technology in modern biological research because it enables researchers to determine the nucleotide composition of DNA and investigate genetic variation, gene function, evolution, and disease mechanisms. Advances from first-generation Sanger sequencing to next-generation sequencing and long-read platforms have greatly increased sequencing capacity while reducing the time and cost required to generate genomic information. Sequencing is now applied to whole genomes, exomes, transcriptomes, microbial communities, and single cells. It supports fields ranging from molecular biology and evolutionary research to clinical genomics, agriculture, microbiology, and precision medicine. This paper examines nine major applications of DNA sequencing, including genome analysis, genetic variation, disease research, transcriptomics, microbial genomics, evolutionary biology, biodiversity, agricultural research, and emerging single-cell and long-read approaches.