Inside every human cell, 2 meters of DNA is crammed into a nucleus that is only one-hundredth of a millimeter in diameter.To ...

Chances are you've seen an illustration of DNA's double-helix structure and ... is a nucleus -- a sphere-like structure separated from the rest of the cell by a membrane. The nucleus acts as ...

However, in the half-century since the structure of DNA was first elaborated ... they carry out biochemical reactions just like enzymes do. Furthermore, many other varieties of RNA have been ...

Beyond the ladder-like structure described above, another key characteristic of double-stranded DNA is its unique three ... scientists must first use a chemical process that attaches the ...