The four bases of DNA are Adenine, Guanine, Cytosine and Thymine. How many kinds of rungs are there on a DNA ladder?
Four
Six
Two
Eight

Respuesta :

Four

The rungs of the DNA ladder made of four types of nitrogenous bases. These are Adenine (A), Guanine (G), Cytosine (C) and Thymine (T).