As Texas prepares to hand out DNA kits to schoolchildren to bring home to parents, other concerned caregivers are weighing in on the issue of DNA kits for kids — and what it says about society.

B-DNA is the most common form of DNA and has a right-handed double helix structure. A-DNA forms in a shorter, right-handed double helix. The function of this form is to protect DNA.

James Watson and Francis Crick revealed the structure of DNA — the genetic instructions in all living things — 70 years ago in the journal Nature. Watson and Crick could not have succeeded ...

Revise the structure and replication of DNA for your Higher biology exam with Bitesize Scotland interactive practice quizzes covering feedback and common errors. BBC Homepage.

DNA is a biological molecule that contains the instructions an organism needs to function, develop, and reproduce. It is present in all forms of life on earth and contains each organism’s ...

Watson and Crick describe structure of DNA 1953 Photo: Model of DNA molecule. In the late nineteenth century, a German biochemist found the nucleic acids, long-chain polymers of nucleotides, were ...

Rosalind Franklin was excluded from the Nobel Prize that was awarded for the discovery of DNA's structure. Photo 12/Getty Images.

Stress and trauma can change your DNA — and the DNA of your kids and grandkids By . Tracy Swartz. Published March 19, 2025, 2:46 p.m. ET.