Задание

What is the DNA chemical structure?

It consists of four nitrogen-containing bases: adenine, guanine, cytosine, and uracil.

It consists of five nitrogen-containing bases: adenine, guanine, cytosine, thymine, and phosphate.

It consists of four nitrogen-containing bases: adenine, guanine, cytosine, and phosphate.

It consists of five nitrogen-containing bases: adenine, guanine, cytosine, thymine, and uracil.