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?

Beyond the ladder-like structure described above, another key characteristic of double-stranded DNA is its unique three-dimensional shape. The first photographic evidence of this shape was ...

But James Watson and Francis Crick's claim was a valid one, for they had in fact discovered the structure of DNA, the chemical that encodes instructions for building and replicating almost all ...

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 ...

This way DNA can reproduce itself without changing its structure -- except for occasional errors, or mutations. The structure so perfectly fit the experimental data that it was almost immediately ...

DNA is a complex molecule that consists of two strands coiled around each other to form a double helix structure. Comparison of a single ... DNA mutations are changes in the nucleotide sequence of the ...

Adenine and guanine, the two most common purines in DNA and RNA, share this core structure, which is crucial for forming ... GTP is another purine nucleotide that plays a crucial role in cellular ...