Nuclear DNA does not appear in free linear strands; it is highly condensed ... which is negatively charged. Some histones function as spools for the thread-like DNA to wrap around.

Ribonucleic acid (RNA) is a linear molecule composed of four types of smaller molecules called ribonucleotide bases: adenine (A), cytosine (C), guanine (G), and uracil (U). RNA is often compared ...