DNA<span> is a long polymer with deoxyriboses and phosphate backbone. Having four </span>different<span> nitrogenous bases: adenine, guanine, cytosine and thymine. </span>RNA is a polymer with a ribose and phosphate backbone<span> Four </span>different<span> nitrogenous bases: adenine, guanine, cytosine, and uracil. hope this helps</span>