DNA

DNA, or deoxyribonucleic acid, is the molecule that carries the genetic information of living organisms. It contains the instructions needed for the development, functioning, and reproduction of cells. DNA is found in almost all living organisms, from bacteria to plants and animals.

In many organisms, it is stored inside the cell nucleus, where it forms structures called chromosomes. The information in DNA is written using four chemical units called bases, arranged in a specific order that acts like a biological code.

DNA is passed from parents to their offspring, allowing many characteristics to be inherited across generations. Small differences in DNA sequences help explain why individuals of the same species are not exactly identical. These variations also contribute to the diversity of life and allow populations to change over time.

Scientists study DNA in many fields, including medicine, genetics, and biology. Understanding DNA helps researchers investigate inherited diseases, identify relationships between organisms, and develop new approaches in areas such as personalized medicine and biotechnology.