DNA: Deoxyribose sugar, double stranded, stable under basic conditions, thymine as a base pair instead of uracil. RNA: Ribose sugar, single stranded, more unstable in basic conditions, uracil as a base pair instead of thymine.
Work Step by Step
Purines and Pyrimidines are the nitrogenous bases that make up the two different nucleotide bases in DNA and RNA. The two-carbon nitrogen ring bases, adenine and guanine, are purines, and the one-carbon nitrogen ring bases, thymine and cytosine, are pyrimidines. Uracil replaces thymine as a pyrimidine for RNA.