3 Main differences between DNA & RNA: RNA uses the sugar Ribose while DNA uses Deoxyribose. RNA is single stranded while DNA is double stranded. RNA uses the nitrogenous base Uracil whereas DNA uses the nitrogenous base Thymine.
Deoxyribonucleic acid (DNA) is the hereditary matter in cells that makes up the repository for genes. DNA's structure consists of sugar, phosphate groups,and nitrogenous bases in its nucleotides. These bases are cytosine, thymine, adenine, and guanine. Cytosine and thymine are classified as pyrimidines that have a single ring. Adenine and guanine are classified as purines that have a double rings. Adenine base pairs with thymine (uracil only in RNA), and cytosine base pairs with guanine.