Shortly after, Watson and Crick made a crucial advance when they proposed that the DNA molecule was made up of two chains of nucleotides paired in such a way to form a double helix, like a spiral ...

The famous DNA double helix is considered right-handed, meaning its spiral strands — a sugar-phosphate backbone — twist to the right. (To picture this, make a thumbs-up with your right hand ...

Nuclear DNA does not appear in free linear strands ... The chain of nucleosomes is then wrapped into a 30 nm spiral called a solenoid, where additional H1 histone proteins are associated with ...