DNA is fundamental to the biology of all life on Earth, but how many of us actually know what it is or what it's made of?

First, he noted that the nucleotide composition of DNA varies ... that A bound to T and C bound to G within the molecular structure of DNA (Figure 2). Chargaff's realization that A = T and C ...

The phosphate group attached to the 5' carbon of the sugar on one nucleotide forms an ester bond ... In double-stranded DNA, the molecular double-helix shape is formed by two linear sugar ...

A light-activated enzyme morphed round starfish egg cells into different shapes. This technology could one day be useful for wound healing therapies.