Definition of GRAVAMEN: The burden or gist of a charge; the grievance or injury specially complained of.In English ecclesiastical law. A grievance complained of by the clergy befo The Law Dictionary Featuring Black's Law Dictionary Free Online Legal Dictionary 2nd Ed.
Phosphate and sugar make up the sides of a DNA ladder.
DNA's double helix is like a long twisted ladder. The rungs of the ladder are made of pairs of four molecules called nucleotides. Adenine (A) and thymine (T) always bond together as a pair, as do cytosine (C) and guanine (G) Our genetic code is made of 3 billion pairs.