DNA
DNA is the molecule that carries the genetic instructions for the development and functioning of living things.
DNA (deoxyribonucleic acid) is the molecule that carries the genetic instructions used in the growth, development and functioning of all known living organisms.
Structure
DNA has a double-helix shape, described by James Watson and Francis Crick in 1953, building on work by Rosalind Franklin. It is made of two strands linked by pairs of chemical bases.
Function
Sequences of bases form genes, which act as instructions to build proteins. DNA is copied and passed from parents to offspring.
Uses
Understanding DNA underpins medicine, forensics and biotechnology, including DNA fingerprinting and genetic engineering.
Frequently asked questions
What does DNA do?
It stores the genetic instructions for building and running living organisms.
What shape is DNA?
A double helix.